Adding workflow for creating documentation issues

[VachaShah]

Signed-off-by: Vacha Shah vachshah@amazon.com

Description

Adding workflow to automatically create issues in documentation-website repo when a needs-documentation label is added to a PR.

Issues Resolved

#425

CheckList:
[X] Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
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[codecov-commenter]

Codecov Report

Merging #458 (a68ee74) into main (95fa134) will increase coverage by 0.14%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main     #458      +/-   ##
============================================
+ Coverage     76.74%   76.89%   +0.14%     
  Complexity      176      176              
============================================
  Files           166      166              
  Lines          8369     8369              
  Branches       1231     1231              
============================================
+ Hits           6423     6435      +12     
+ Misses         1342     1328      -14     
- Partials        604      606       +2     

Impacted Files	Coverage Δ
.../kotlin/org/opensearch/alerting/util/IndexUtils.kt	72.91% <0.00%> (+2.08%)	⬆️
.../alerting/transport/TransportIndexMonitorAction.kt	71.32% <0.00%> (+3.14%)	⬆️
...nationmigration/DestinationMigrationCoordinator.kt	68.08% <0.00%> (+4.25%)	⬆️

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