Add oauth2 for webhook2.0

[cyberlord29]

For Webhooks 2.0 which is an extensible destination, more like a generic webhook that has OAuth2 and custom settings that are dynamic.

This PR adds Oauth 2 for the new destination webhook-extensible and an HTTP send action.

SDD

Testing

Added unit tests and ran a regression test

[joe-ayoub-segment]

hi @cyberlord29 please ping me directly when this PR is ready for review.

[codecov]

Codecov Report

Attention: Patch coverage is 63.88889% with 13 lines in your changes missing coverage. Please review.

Project coverage is 78.98%. Comparing base (5a5f52b) to head (78251a8).
Report is 18 commits behind head on main.

Files with missing lines	Patch %	Lines
.../src/destinations/webhook-extensible/send/index.ts	44.44%	8 Missing and 2 partials ⚠️
...tions/src/destinations/webhook-extensible/index.ts	66.66%	2 Missing ⚠️
packages/core/src/destination-kit/action.ts	50.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2334       +/-   ##
===========================================
+ Coverage   33.18%   78.98%   +45.79%     
===========================================
  Files          14     1210     +1196     
  Lines         693    21954    +21261     
  Branches      109     4448     +4339     
===========================================
+ Hits          230    17340    +17110     
- Misses        463     3542     +3079     
- Partials        0     1072     +1072     

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[varadarajan-tw]

Overall, the changes look good to me. Left couple of questions.

We need to ensure that actions-core changes don't break any existing behaviour. A hadron regression run can be helpful. I can help you do that tomorrow.

[joe-ayoub-segment]

hi @sayan-das-in - would you be able to review the core change in this PR please? I'm not concerned about the Destination specific code so you can ignore that - but there is a core change in Destination Kit which I'd like someone experienced to review.

@cyberlord29 is keen to get this out today if possible.

edit: I can see that the folks in India are OOO today. So unfortunately this PR will have to wait.