[PLAT-12293] Fix GCP provider creation for v1 APIs

Summary: v1 APIs don't have the construct for details, added the safe check for it to be present

Test Plan: Tested GCP provider creation using v1 payload.

Reviewers: vbansal

Reviewed By: vbansal

Subscribers: yugaware

Differential Revision: https://phorge.dev.yugabyte.com/D31743

Author: Shubham

managed/src/main/java/com/yugabyte/yw/controllers/CloudProviderApiController.java

@@ -504,12 +504,13 @@ private JsonNode mayBeMassageRequest(JsonNode requestBody, Boolean forEdit) {
       // JSON object.
       ObjectMapper mapper = Json.mapper();
       ObjectNode details = (ObjectNode) requestBody.get("details");
-      if (details.has("cloudInfo")) {
+      if (details != null && details.has("cloudInfo")) {
         ObjectNode cloudInfo = (ObjectNode) details.get("cloudInfo");
-        if (cloudInfo.has("gcp")) {
+        if (cloudInfo != null && cloudInfo.has("gcp")) {
           ObjectNode gcpCloudInfo = (ObjectNode) cloudInfo.get("gcp");
           try {
-            if (gcpCloudInfo.has("gceApplicationCredentials")
+            if (gcpCloudInfo != null
+                && gcpCloudInfo.has("gceApplicationCredentials")
                 && !(gcpCloudInfo.get("gceApplicationCredentials").isTextual())) {
               gcpCloudInfo.put(
                   "gceApplicationCredentials",