[FUNK-1504] actions-webhook-extensible - Make changes to oauth2 refresh token handler

[cyberlord29]

Made changes to to the refreshtoken handler to handle different flows for oauth2.0
Changes limited to action folder

Precursor to removing duplicate oauth object inside dynamicAuthSettings and introducing dynamic auth options into Destination Kit

Testing

Include any additional information about the testing you have completed to
ensure your changes behave as expected. For a speedy review, please check
any of the tasks you completed below during your testing.

• Added unit tests for new functionality
• Tested end-to-end using the local server
• [If destination is already live] Tested for backward compatibility of destination. Note: New required fields are a breaking change.
• [Segmenters] Tested in the staging environment
• [Segmenters] [If applicable for this change] Tested for regression with Hadron.

[codecov]

Codecov Report

Attention: Patch coverage is 11.11111% with 8 lines in your changes missing coverage. Please review.

Project coverage is 78.51%. Comparing base (b3bf231) to head (999eb3d).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...tions/src/destinations/webhook-extensible/index.ts	11.11%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2630      +/-   ##
==========================================
- Coverage   78.97%   78.51%   -0.46%     
==========================================
  Files        1083     1030      -53     
  Lines       20838    18199    -2639     
  Branches     4150     3436     -714     
==========================================
- Hits        16456    14289    -2167     
+ Misses       3233     2767     -466     
+ Partials     1149     1143       -6     

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[cyberlord29]

Callout - will get rid of this in the next iteration when we introduce dynamic auth options in the authentication types in destination kit

[varadarajan-tw]

Is the access path oauth.access.refresh_token correct? or should it be oauth.refresh_token?

[cyberlord29]

oauth.access.refresh_token, access has tokens and ttl