Fix typescript issues in Destinations and CLI

[sayan-das-in]

This PR aims to fix minor type issues for Node version upgrade with typescript 4.9.5 and simplifies this PR.

Testing

Tested locally with unit tests.

• 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 41.17647% with 10 lines in your changes missing coverage. Please review.

Project coverage is 78.56%. Comparing base (25a5473) to head (f55db48).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/cli/src/commands/generate/action.ts	0.00%	4 Missing ⚠️
packages/cli/src/commands/init.ts	0.00%	3 Missing ⚠️
...re-experimentation-actions/trackEvent/functions.ts	33.33%	2 Missing ⚠️
...src/destinations/intercom/identifyContact/index.ts	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2725      +/-   ##
==========================================
- Coverage   79.07%   78.56%   -0.52%     
==========================================
  Files        1089     1036      -53     
  Lines       21534    18767    -2767     
  Branches     4330     3562     -768     
==========================================
- Hits        17029    14744    -2285     
+ Misses       3298     2822     -476     
+ Partials     1207     1201       -6     

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