[PLAT-15976] Add static config to enable node agent in provider for YBM

Summary:
An independent config is added to independently control the behavior for YBM testing. The steps would be
1. Enable this feature for YBM for testing in local setup.
2. Roll out this feature in higher env later once the tests are fine.

Test Plan: Created an onprem provider and verified that the flag was set in the provider details in the DB entry.

Reviewers: cwang, sanketh, nbhatia

Reviewed By: cwang

Subscribers: yugaware

Differential Revision: https://phorge.dev.yugabyte.com/D39742

managed/src/main/java/com/yugabyte/yw/controllers/handlers/CloudProviderHandler.java

@@ -136,7 +136,8 @@ public Provider createProvider(
         }
       }
     }
-    if (reqProvider.getCloudCode() != kubernetes && !config.getBoolean("yb.cloud.enabled")) {
+    if (reqProvider.getCloudCode() != kubernetes
+        && !config.getBoolean("yb.internal.disable_node_agent_provider_property")) {
       // Always enable for non-k8s providers.
       reqProvider.getDetails().setEnableNodeAgent(true);
     }

managed/src/main/java/com/yugabyte/yw/models/ProviderDetails.java

@@ -20,6 +20,7 @@
 import com.yugabyte.yw.models.helpers.provider.LocalCloudInfo;
 import com.yugabyte.yw.models.helpers.provider.OnPremCloudInfo;
 import io.swagger.annotations.ApiModelProperty;
+import io.swagger.annotations.ApiModelProperty.AccessMode;
 import java.util.Objects;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
@@ -46,8 +47,10 @@ public static class CloudInfo {
   }
 
   @ApiModelProperty private CloudInfo cloudInfo;
+
   // Flag to enable node agent for this provider depending on the runtime config settings.
-  @ApiModelProperty public boolean enableNodeAgent;
+  @ApiModelProperty(accessMode = AccessMode.READ_ONLY)
+  public boolean enableNodeAgent;
 
   @JsonIgnore
   public boolean isUpdateNeeded(ProviderDetails details) {

managed/src/main/resources/reference.conf

@@ -1010,6 +1010,8 @@ yb {
     allow_unsupported_instances = false
     # Enabled fault injected paths with failure rates. E.g ybops.cloud.azure.utils.test1=0.2.
     ybops_fault_injected_paths = ""
+    # Disable node agent property in provider details.
+    disable_node_agent_provider_property = ${yb.cloud.enabled}
   }
 
   dbmem {

managed/src/main/resources/swagger-strict.json

@@ -9570,6 +9570,7 @@
           "$ref" : "#/definitions/CloudInfo"
         },
         "enableNodeAgent" : {
+          "readOnly" : true,
           "type" : "boolean"
         },
         "installNodeExporter" : {

managed/src/main/resources/swagger.json

@@ -9666,6 +9666,7 @@
           "$ref" : "#/definitions/CloudInfo"
         },
         "enableNodeAgent" : {
+          "readOnly" : true,
           "type" : "boolean"
         },
         "installNodeExporter" : {