[BEAM-14118, fixes #21639] Use vendored gRPC 1.48.1

[lukecwik]

This change:

• swaps java imports
• fixes a new deprecation issue TextFormat.printToString -> TextFormat.printer().printToString caused by the update
• deletes the old 1.43.2 package

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[lukecwik]

R: @emilymye @jigga

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[codecov[bot]]

Codecov Report

Merging #22628 (e55698b) into master (1f2186d) will decrease coverage by 0.01%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #22628      +/-   ##
==========================================
- Coverage   74.20%   74.19%   -0.02%     
==========================================
  Files         708      708              
  Lines       93462    93462              
==========================================
- Hits        69355    69342      -13     
- Misses      22832    22845      +13     
  Partials     1275     1275              

Flag	Coverage Δ
python	83.59% <ø> (-0.02%)	:arrow_down:

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Impacted Files	Coverage Δ
.../python/apache_beam/testing/test_stream_service.py	88.09% <0.00%> (-4.77%)	:arrow_down:
...che_beam/runners/interactive/interactive_runner.py	90.06% <0.00%> (-1.33%)	:arrow_down:
sdks/python/apache_beam/io/localfilesystem.py	90.97% <0.00%> (-0.76%)	:arrow_down:
...eam/runners/portability/fn_api_runner/execution.py	92.44% <0.00%> (-0.65%)	:arrow_down:
sdks/python/apache_beam/runners/direct/executor.py	96.46% <0.00%> (-0.55%)	:arrow_down:
...ks/python/apache_beam/runners/worker/sdk_worker.py	88.94% <0.00%> (-0.16%)	:arrow_down:
sdks/python/apache_beam/transforms/util.py	96.06% <0.00%> (-0.16%)	:arrow_down:
...hon/apache_beam/runners/worker/bundle_processor.py	93.54% <0.00%> (-0.13%)	:arrow_down:
...eam/runners/interactive/interactive_environment.py	92.02% <0.00%> (+0.30%)	:arrow_up:

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[lukecwik]

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[lukecwik]

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[lukecwik]

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[lukecwik]

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[Abacn]

~Seems it breaks Java Wordcount Dataflow github action: https://github.com/apache/beam/runs/7774388676?check_suite_focus=true~ never mind, this one was flake; failure is due to another issue.