[Task]: Test for Multiple Envs Feature with Paragon Connect Credential ID

[NilanshBansal]

SubTasks

Test for Multiple Envs Feature with Paragon Connect Credential ID for a datasource using externalSaas plugin
Proxy API multiple account docs: https://docs-prod.useparagon.com/api/api-reference/multiple-account-authorizations#request-integrationtype-string-path-string-requestoptions-requestoptions-promise

[NilanshBansal]

This is dependent on Paragon. They do not support CredentialId right now.
Ref: https://theappsmith.slack.com/archives/C07NTH2TH3M/p1737007096987959?thread_ts=1735885574.338189&cid=C07NTH2TH3M
The timeline given by Paragon team is 2 weeks from today, hence we are moving this to Milestone 2.
cc: @carinanfonseca @AmanAgarwal041 @sneha122 @nerbos