docs: Add description to temporary .github/ISSUE_TEMPLATE files

[sarina]

This PR was autogenerated

This PR will be automerged

Adding comments to previously added depr issue template and config, to indicate that they are temporary and need to be removed in the future. This PR adds nothing more than comments to a type of file that is only used to template GitHub Issues.

[codecov]

Codecov Report

Merging #57 (dfb372f) into master (9ba38b0) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #57   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines           96        96           
  Branches        14        14           
=========================================
  Hits            96        96           

Flag	Coverage Δ
unittests	100.00% <ø> (ø)

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