SNOW-760002: add stale issue clean bot

[sfc-gh-aling]

Please answer these questions before submitting your pull requests. Thanks!

1. What GitHub issue is this PR addressing? Make sure that there is an accompanying issue to your PR.

   Fixes #NNNN

2. Fill out the following pre-review checklist:

   • I am adding a new automated test(s) to verify correctness of my new code
   • I am adding new logging messages
   • I am adding new credentials
   • I am adding a new dependency

3. Please describe how your code solves the related issue.

   Please write a short description of how your code change solves the related issue.

[codecov]

Codecov Report

Merging #401 (04962c4) into main (b161892) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #401   +/-   ##
=======================================
  Coverage   81.28%   81.28%           
=======================================
  Files          10       10           
  Lines        1277     1277           
  Branches      192      192           
=======================================
  Hits         1038     1038           
  Misses        176      176           
  Partials       63       63           

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