Derisk carbon implementation

[somangshu]

https://www.notion.so/appsmith/RAG-Integrations-196fe271b0e2808895eae4be2e53b355

Information added about the Integrations tested and added to carbon connect.

[nsarupr]

Once we are done validating the below connectors we can close this issue:

1. Sharepoint
2. Onedrive
3. ServiceNow

cc: @infinitetrooper

[nsarupr]

@infinitetrooper is doing active communications with ServiceNow team about getting the account.
On Sharepoint, we have an issue, where we cannot add files once the authentication is complete.