Added Key support for Authorization header.

[sonnykt]

Checklist before requesting a review

• I have formatted the subject to include ticket number as [#123] Verb in past tense with dot at the end.
• I have added a link to the issue tracker
• I have provided information in Changed section about WHY something was done if this was not a normal implementation
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works
• I have run new and existing relevant tests locally with my changes, and they passed
• I have provided screenshots, where applicable

Changed

1. Added Key support for Authorization header.

Screenshots

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 13 lines in your changes missing coverage. Please review.

Project coverage is 3.52%. Comparing base (a161afc) to head (7353a02).
Report is 2 commits behind head on 1.x.

Files with missing lines	Patch %	Lines
src/WebformThirdPartySettingsFormAlter.php	0.00%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##               1.x     #34      +/-   ##
==========================================
- Coverage     3.56%   3.52%   -0.05%     
  Complexity     250     250              
==========================================
  Files           16      16              
  Lines         1093    1106      +13     
==========================================
  Hits            39      39              
- Misses        1054    1067      +13     

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