Remove uses of "master"

[brettcannon]

Left usage in src/datascience-ui/data-explorer/testData.ts as that's historical data from (I believe) the Titanic's traveller manifest.

This should not be merged until the actual renaming occurs.

Part of #13645

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities (and 0 Security Hotspots to review)
0 Code Smells

No Coverage information
1.2% Duplication

[codecov-commenter]

Codecov Report

Merging #13646 into main will increase coverage by 0.17%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main   #13646      +/-   ##
==========================================
+ Coverage   59.71%   59.89%   +0.17%     
==========================================
  Files         673      682       +9     
  Lines       37658    37935     +277     
  Branches     5402     5462      +60     
==========================================
+ Hits        22488    22721     +233     
- Misses      14017    14038      +21     
- Partials     1153     1176      +23     

Impacted Files	Coverage Δ
src/client/common/experiments/manager.ts	96.00% <100.00%> (ø)
src/client/datascience/kernel-launcher/helpers.ts	14.28% <0.00%> (-42.86%)	⬇️
src/client/common/utils/platform.ts	56.00% <0.00%> (-14.59%)	⬇️
src/client/datascience/crossProcessLock.ts	79.41% <0.00%> (-11.77%)	⬇️
src/client/linters/pydocstyle.ts	86.66% <0.00%> (-2.23%)	⬇️
...client/datascience/kernel-launcher/kernelFinder.ts	71.71% <0.00%> (-1.82%)	⬇️
...s/discovery/locators/services/KnownPathsService.ts	48.21% <0.00%> (-1.79%)	⬇️
src/client/datascience/debugLocationTracker.ts	76.56% <0.00%> (-1.57%)	⬇️
src/client/common/process/proc.ts	14.49% <0.00%> (-0.73%)	⬇️
src/client/datascience/jupyter/kernels/helpers.ts	34.86% <0.00%> (-0.66%)	⬇️
... and 62 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4b2b333...af0d765. Read the comment docs.