[#3140] docs(partition): add docs and OAS for drop partition operation

docs/manage-table-partition-using-gravitino.md

@@ -19,13 +19,13 @@ Although many catalogs inherently manage partitions automatically, there are sce
 
 The following table shows the partition operations supported across various catalogs in Gravitino:
 
-| Operation             | Hive catalog                                                                  | Iceberg catalog                                                               | Jdbc-Mysql catalog | Jdbc-PostgreSQL catalog |
-|-----------------------|-------------------------------------------------------------------------------|-------------------------------------------------------------------------------|--------------------|-------------------------|
-| Add Partition         | ✔                                                                      | ✘                                                                      | ✘           | ✘                |
-| Get Partition by Name | ✔                                                                      | ✘                                                                      | ✘           | ✘                |
-| List Partition Names  | ✔                                                                      | ✘                                                                      | ✘           | ✘                |
-| List Partitions       | ✔                                                                      | ✘                                                                      | ✘           | ✘                |
-| Drop Partition        | 🚀([Coming Soon](https://github.com/datastrato/gravitino/issues/1655)) | 🚀([Coming Soon](https://github.com/datastrato/gravitino/issues/1655)) | ✘           | ✘                |
+| Operation             | Hive catalog | Iceberg catalog                                                               | Jdbc-Mysql catalog | Jdbc-PostgreSQL catalog |
+|-----------------------|--------------|-------------------------------------------------------------------------------|--------------------|-------------------------|
+| Add Partition         | ✔     | ✘                                                                      | ✘           | ✘                |
+| Get Partition by Name | ✔     | ✘                                                                      | ✘           | ✘                |
+| List Partition Names  | ✔     | ✘                                                                      | ✘           | ✘                |
+| List Partitions       | ✔     | ✘                                                                      | ✘           | ✘                |
+| Drop Partition        | ✔     | 🚀([Coming Soon](https://github.com/datastrato/gravitino/issues/1655)) | ✘           | ✘                |
 
 :::tip[WELCOME FEEDBACK]
 If you need additional partition management support for a specific catalog, please feel free to [create an issue](https://github.com/datastrato/gravitino/issues/new/choose) on the [Gravitino repository](https://github.com/datastrato/gravitino).
@@ -374,5 +374,45 @@ Partition[] partitions =
             .listPartitions();
 ```
 
+</TabItem>
+</Tabs>
+
+### Drop a partition by name
+
+You can drop a partition by its name via sending a `DELETE` request to the `/api/metalakes/{metalake_name}/catalogs/{catalog_name}/schemas/{schema_name}/tables/{partitioned_table_name}/partitions/{partition_name}` endpoint or by using the Gravitino Java client.
+The following is an example of dropping a partition by its name:
+
+<Tabs>
+<TabItem value="shell" label="Shell">
+
+```shell
+curl -X DELETE -H "Accept: application/vnd.gravitino.v1+json" \
+-H "Content-Type: application/json" \
+http://localhost:8090/api/metalakes/metalake/catalogs/catalog/schemas/schema/tables/table/partitions/p20200321
+```
+
+:::tip
+If the partition name contains special characters, you should use [URL encoding](https://en.wikipedia.org/wiki/Percent-encoding#Reserved_characters). For example, if the partition name is `dt=2008-08-08/country=us` you should use `dt%3D2008-08-08%2Fcountry%3Dus` in the URL.
+:::
+
+</TabItem>
+<TabItem value="java" label="Java">
+
+```java
+GravitinoClient gravitinoClient = GravitinoClient
+    .builder("http://127.0.0.1:8090")
+    .withMetalake("metalake")
+    .build();
+
+// Assume that you have a partitioned table named "metalake.catalog.schema.table".
+Partition Partition = 
+    gravitinoClient
+        .loadCatalog(NameIdentifier.of("metalake", "catalog"))
+        .asTableCatalog()
+        .loadTable(NameIdentifier.of("metalake", "catalog", "schema", "table"))
+        .supportPartitions()
+        .dropPartition("partition_name");
+```
+
 </TabItem>
 </Tabs>

docs/open-api/partitions.yaml

@@ -105,6 +105,22 @@ paths:
         "5xx":
           $ref: "./openapi.yaml#/components/responses/ServerErrorResponse"
 
+    delete:
+      tags:
+        - partition
+      summary: Drop partition by name
+      operationId: dropPartition
+      description: Drops the specified partition
+      parameters:
+        - $ref: "#/components/parameters/purge"
+      responses:
+        "200":
+          $ref: "./openapi.yaml#/components/responses/DropResponse"
+        "400":
+          $ref: "./openapi.yaml#/components/responses/BadRequestErrorResponse"
+        "5xx":
+          $ref: "./openapi.yaml#/components/responses/ServerErrorResponse"
+
 
 components:
   parameters:
@@ -117,6 +133,15 @@ components:
         type: boolean
         default: false
 
+    purge:
+      name: purge
+      in: query
+      description: Purge the partition data
+      required: false
+      schema:
+        type: boolean
+        default: false
+
     partition:
       name: partition
       in: path

docs/open-api/tables.yaml

@@ -141,6 +141,8 @@ paths:
         - table
       summary: Drop table
       operationId: dropTable
+      parameters:
+        - $ref: "#/components/parameters/purge"
       responses:
         "200":
           $ref: "./openapi.yaml#/components/responses/DropResponse"
@@ -151,6 +153,15 @@ paths:
 
 
 components:
+  parameters:
+    purge:
+      name: purge
+      in: query
+      description: Removes both the metadata and the directory associated with the table completely and skipping trash.
+      required: false
+      schema:
+        type: boolean
+        default: false
 
   schemas:
     TableCreateRequest: