Speed up githook by skipping commits not containing any .ts files

[DonJayamanne]

Fixes #1803

This pull request:

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• Includes a news entry file (remember to thank yourself!)

[codecov]

Codecov Report

Merging #1805 into master will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1805      +/-   ##
==========================================
- Coverage    74.1%   74.07%   -0.04%     
==========================================
  Files         282      282              
  Lines       13089    13089              
  Branches     2335     2335              
==========================================
- Hits         9700     9696       -4     
- Misses       3259     3260       +1     
- Partials      130      133       +3

Impacted Files	Coverage Δ
src/client/debugger/PythonProcess.ts	49.58% <0%> (-1.67%)	⬇️
src/client/debugger/Main.ts	51.85% <0%> (-0.5%)	⬇️
...reter/locators/services/cacheableLocatorService.ts	95.91% <0%> (+4.08%)	⬆️

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