Add gh workflow to publish flyteidl to buf

[eapolinario]

Describe your changes

Buf all the things.

TODO

• Delete pull_request from gh workflow before merging

Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Screenshots

Note to reviewers

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (4ee73f5) 59.44% compared to head (8c0abd3) 78.48%.
Report is 7 commits behind head on master.

❗ Current head 8c0abd3 differs from pull request most recent head 85b7cc2. Consider uploading reports for the commit 85b7cc2 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #4178       +/-   ##
===========================================
+ Coverage   59.44%   78.48%   +19.03%     
===========================================
  Files         637       18      -619     
  Lines       54262     1250    -53012     
===========================================
- Hits        32254      981    -31273     
+ Misses      19467      212    -19255     
+ Partials     2541       57     -2484     

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see 637 files with indirect coverage changes

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