Fix Spark 3 job-server jar path for Python test suites

[mosche]

This slipped in #23751 when migrating to the Spark 3 job-server.
Closes #23935, related to #23907

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[mosche]

R: @aromanenko-dev

[github-actions]

Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control

[ahmedabu98]

Run Python Examples_Spark

[aromanenko-dev]

LGTM, thanks

[aromanenko-dev]

Run Python PreCommit

[aromanenko-dev]

Run Python Examples_Spark

[ahmedabu98]

The failing Spark example tests are due to another issue #23907

[codecov]

Codecov Report

Merging #23936 (3b5aac5) into master (2bf0795) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #23936      +/-   ##
==========================================
- Coverage   73.52%   73.51%   -0.01%     
==========================================
  Files         707      707              
  Lines       95832    95832              
==========================================
- Hits        70463    70454       -9     
- Misses      24052    24061       +9     
  Partials     1317     1317              

Flag	Coverage Δ
python	83.31% <ø> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../python/apache_beam/testing/test_stream_service.py	88.09% <0.00%> (-4.77%)	⬇️
sdks/python/apache_beam/utils/interactive_utils.py	95.12% <0.00%> (-2.44%)	⬇️
sdks/python/apache_beam/io/source_test_utils.py	88.47% <0.00%> (-1.39%)	⬇️
...che_beam/runners/interactive/interactive_runner.py	90.50% <0.00%> (-1.27%)	⬇️
sdks/python/apache_beam/transforms/combiners.py	93.05% <0.00%> (-0.39%)	⬇️
.../python/apache_beam/transforms/periodicsequence.py	100.00% <0.00%> (+1.61%)	⬆️

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[aromanenko-dev]

@ahmedabu98 yes but this PR should fix this, right?
#23907 (comment)
cc: @mosche

[mosche]

@aromanenko-dev No,it's yet another issue

[ahmedabu98]

@aromanenko-dev I think there are two separate issues blocking the release. This solves one of them, the other is a BQ issue (see comment) that affects both Spark and Flink example test suites

[aromanenko-dev]

Ok, so I think we can move forward and merge it