fix(AWS HTTP API): Ensure to apply tags to stage

[filipgolonka]

Closes: #9395

[pgrzesik]

Thank you @filipgolonka - it looks good 👍 I have just one minor ask - could you please extend the documentation a bit to inform that it also will apply tags to the stage resource?
https://github.com/serverless/serverless/blob/master/docs/providers/aws/events/http-api.md#tags

[codecov]

Codecov Report

Merging #9407 (097f717) into master (d647125) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #9407   +/-   ##
=======================================
  Coverage   86.89%   86.90%           
=======================================
  Files         321      321           
  Lines       11959    11963    +4     
=======================================
+ Hits        10392    10396    +4     
  Misses       1567     1567           

Impacted Files	Coverage Δ
lib/plugins/aws/package/compile/events/httpApi.js	93.48% <100.00%> (+0.06%)	⬆️
lib/cli/render-help/index.js	100.00% <0.00%> (ø)

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[filipgolonka]

Thanks for the review @pgrzesik. Yep, it sounds sane to extend the doc - it is done now.

[pgrzesik]

Thank you @filipgolonka - great job 👏