Update backport and add auto-delete workflows

[davidcui1225]

Description

Update backport workflow and add for auto deleting branches

Issues Resolved

#310

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• 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.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov-commenter]

Codecov Report

Merging #446 (2ff39d5) into main (b9a642c) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #446   +/-   ##
=========================================
  Coverage     96.51%   96.51%           
  Complexity     2698     2698           
=========================================
  Files           267      267           
  Lines          7149     7149           
  Branches        520      520           
=========================================
  Hits           6900     6900           
  Misses          196      196           
  Partials         53       53           

Flag	Coverage Δ
query-workbench	62.91% <ø> (ø)
sql-engine	99.92% <ø> (ø)

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