Implement Web API connector interfaces

[damondouglas]

This PR addresses #30423 with the Web API connector interfaces. A future PR will create the actual transform that processes Web API requests into a response PCollection.

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 60.97561% with 32 lines in your changes are missing coverage. Please review.

Project coverage is 70.72%. Comparing base (fc5df6f) to head (b8e8747).

Files	Patch %	Lines
sdks/go/pkg/beam/io/webapi/webapi.go	60.97%	25 Missing and 7 partials :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #30815      +/-   ##
============================================
- Coverage     70.73%   70.72%   -0.02%     
  Complexity     4468     4468              
============================================
  Files          1256     1257       +1     
  Lines        140774   140856      +82     
  Branches       4306     4306              
============================================
+ Hits          99581    99622      +41     
- Misses        37714    37745      +31     
- Partials       3479     3489      +10     

Flag	Coverage Δ
go	54.34% <60.97%> (-0.01%)	:arrow_down:

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Assigning reviewers. If you would like to opt out of this review, comment assign to next reviewer:

R: @lostluck for label go. R: @Abacn for label io.

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[github-actions[bot]]

Reminder, please take a look at this pr: @lostluck @Abacn

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 60.97561% with 32 lines in your changes are missing coverage. Please review.

Project coverage is 70.72%. Comparing base (b34cf54) to head (b8e8747). Report is 289 commits behind head on master.

:exclamation: Current head b8e8747 differs from pull request most recent head 4239007

Please upload reports for the commit 4239007 to get more accurate results.

Files	Patch %	Lines
sdks/go/pkg/beam/io/webapi/webapi.go	60.97%	25 Missing and 7 partials :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #30815      +/-   ##
============================================
- Coverage     71.44%   70.72%   -0.73%     
- Complexity     1474     4468    +2994     
============================================
  Files           906     1257     +351     
  Lines        113271   140856   +27585     
  Branches       1076     4306    +3230     
============================================
+ Hits          80931    99622   +18691     
- Misses        30327    37745    +7418     
- Partials       2013     3489    +1476     

Flag	Coverage Δ
go	54.34% <60.97%> (+<0.01%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[github-actions[bot]]

Reminder, please take a look at this pr: @lostluck @Abacn

[github-actions[bot]]

Assigning new set of reviewers because Pr has gone too long without review. If you would like to opt out of this review, comment assign to next reviewer:

R: @jrmccluskey for label go. R: @chamikaramj for label io.

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[damondouglas]

@lostluck This is ready but not urgent.

[github-actions[bot]]

Reminder, please take a look at this pr: @jrmccluskey @chamikaramj

[github-actions[bot]]

Assigning new set of reviewers because Pr has gone too long without review. If you would like to opt out of this review, comment assign to next reviewer:

R: @riteshghorse for label go. R: @ahmedabu98 for label io.

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[github-actions[bot]]

Reminder, please take a look at this pr: @riteshghorse @ahmedabu98

[damondouglas]

Closing this after talking with @lostluck . Summary what I got out of the conversation is that the best strategy to expand I/O coverage is to submit an end-to-end I/O using the Go SDK (non-xlang) before contributing any abstractions like this PR attempts. This PR follows what already exists in Java and Python. For Java, it's RequestRequestIO eliminated a lot of boilerplate but this may not necessarily be needed in Go.