fix: increase the content length to fix large file size not working. (#…

…35354)

## Description
> [!TIP]  
> _Add a TL;DR when the description is longer than 500 words or
extremely technical (helps the content, marketing, and DevRel team)._
>
> _Please also include relevant motivation and context. List any
dependencies that are required for this change. Add links to Notion,
Figma or any other documents that might be relevant to the PR._


Fixes #`Issue Number`  
_or_  
Fixes `Issue URL`
> [!WARNING]  
> _If no issue exists, please create an issue first, and check with the
maintainers if the issue is valid._

## Automation

/ok-to-test tags="@tag.Datasource"

### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results  -->
> [!TIP]
> 🟢 🟢 🟢 All cypress tests have passed! 🎉 🎉 🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/10212521266>
> Commit: 3f4d4a7
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=10212521266&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Datasource`
> Spec:
> <hr>Fri, 02 Aug 2024 09:02:19 UTC
<!-- end of auto-generated comment: Cypress test results  -->


## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [ ] No


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Enhanced configuration for handling multipart form data, allowing for
the processing of larger files without data truncation.
  
- **Improvements**
- Streamlined initialization of the data processing component, improving
readability and maintainability.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

app/server/appsmith-interfaces/src/main/java/com/appsmith/external/helpers/restApiUtils/helpers/DataUtils.java

@@ -9,6 +9,7 @@
 import com.appsmith.external.models.Property;
 import com.appsmith.util.SerializationUtils;
 import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.StreamReadConstraints;
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
@@ -80,8 +81,16 @@ public enum MultipartFormDataType {
     }
 
     public DataUtils() {
-        this.objectMapper = SerializationUtils.getObjectMapperWithSourceInLocationEnabled();
-        this.objectMapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
+        this.objectMapper = SerializationUtils.getObjectMapperWithSourceInLocationEnabled()
+                .disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
+
+        // Multipart data would be parsed using object mapper, these files may be large in the size.
+        // Hence, the length should not be truncated, therefore allowing maximum length.
+        this.objectMapper
+                .getFactory()
+                .setStreamReadConstraints(StreamReadConstraints.builder()
+                        .maxStringLength(Integer.MAX_VALUE)
+                        .build());
     }
 
     public BodyInserter<?, ?> buildBodyInserter(Object body, String contentType, Boolean encodeParamsToggle) {