feat: Added Support for ingest license key

[Sashwatdas123]

Ticket: NR-440836

Details:

• Added support for Ingest-License Key.
• Command supporting ingest-license key:

newrelic-lambda layers install \
    --function <Function Name> \
    --nr-account-id <Your Account Id> \
    --nr-ingest-key <Your Ingest Key>

[codecov]

Codecov Report

❌ Patch coverage is 77.77778% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.04%. Comparing base (8ace961) to head (c7297b8).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
newrelic_lambda_cli/api.py	0.00%	2 Missing ⚠️
newrelic_lambda_cli/cli/layers.py	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #344      +/-   ##
==========================================
+ Coverage   76.26%   77.04%   +0.77%     
==========================================
  Files          18       18              
  Lines        1626     1642      +16     
==========================================
+ Hits         1240     1265      +25     
+ Misses        386      377       -9     

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[aavinash-nr]

@Sashwatdas123 Looks good to me 👏 . I have locally tested everything working fine.