Revamp Google PubSub/Big Query/Ads connectors

[RDPerera]

Description

Current Limitation

Google PubSub/Big Query/Ads connector needs to be updated to align with WSO2 MI 4.4.0 enhancements, including a new response model, test connection functionality, and structured output schemas for improved usability and reliability.

Suggested Improvement

1. Implement New Response Model
2. Add Output Schemas for Operations
3. Improve the UX of the operations listed in VSCode.

Version

4.4.0

Version

No response

[RDPerera]

Google Pub/Sub connector revamped.

PR: wso2-extensions/mi-connector-googlepubsub#34
Docs Update: wso2/docs-mi#1611

[RDPerera]

Google BigQuery connector revamped.

PR: wso2-extensions/mi-connector-bigquery#61

[kalaiyarasiganeshalingam]

I have started to work on GoogleAds #4222