Functional test for run by line

[rchiodo]

For #11660

Add a new test that ensures run by line continues to work.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

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

No Coverage information
0.0% Duplication

[codecov-io]

Codecov Report

Merging #11746 into master will decrease coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #11746      +/-   ##
==========================================
- Coverage   60.72%   60.66%   -0.06%     
==========================================
  Files         629      628       -1     
  Lines       34007    33908      -99     
  Branches     4795     4774      -21     
==========================================
- Hits        20650    20571      -79     
+ Misses      12364    12339      -25     
- Partials      993      998       +5     

Impacted Files	Coverage Δ
...ience/interactive-common/interactiveWindowTypes.ts	100.00% <100.00%> (ø)
src/datascience-ui/react-common/arePathsSame.ts	75.00% <0.00%> (-12.50%)	⬇️
src/client/common/utils/platform.ts	64.70% <0.00%> (-11.77%)	⬇️
src/client/common/utils/misc.ts	63.63% <0.00%> (-10.73%)	⬇️
src/client/logging/transports.ts	77.77% <0.00%> (-3.48%)	⬇️
src/client/common/utils/decorators.ts	78.02% <0.00%> (-2.38%)	⬇️
src/client/linters/pydocstyle.ts	86.66% <0.00%> (-2.23%)	⬇️
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/common/logger.ts	100.00% <0.00%> (ø)
... and 11 more

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