Fix: Add setuptools < 82 constraint for grpcio-tools compatibility

[rahur-NI]

• This contribution adheres to CONTRIBUTING.md.
• I've updated CHANGELOG.md if applicable.
• I've added tests applicable for this pull request

What does this Pull Request accomplish?

Adds setuptools < 82 constraint to the codegen environment in both tox.ini and tox-travis.ini to maintain compatibility with grpcio-tools 1.59.0.

grpcio-tools 1.59.0 depends on pkg_resources, which was removed in setuptools 82.0.0. Without this constraint, the codegen environment fails when setuptools >= 82 is installed. Due to this, tox execution was failing in master.

What testing has been done?

• Successful local tox build verification with setuptools < 82 constraint applied
• Validated that both tox.ini and tox-travis.ini are updated as needed.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.09%. Comparing base (f83c4a2) to head (f197483).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2163   +/-   ##
=======================================
  Coverage   90.09%   90.09%           
=======================================
  Files          71       71           
  Lines       18662    18662           
=======================================
+ Hits        16813    16814    +1     
+ Misses       1849     1848    -1     

Flag	Coverage Δ
codegenunittests	84.44% <ø> (ø)
nidcpowersystemtests	94.65% <ø> (+0.04%)	⬆️
nidcpowerunittests	89.53% <ø> (ø)
nidigitalsystemtests	92.26% <ø> (ø)
nidigitalunittests	68.44% <ø> (ø)
nidmmsystemtests	92.72% <ø> (ø)
nifakeunittests	85.70% <ø> (ø)
nifgensystemtests	94.61% <ø> (ø)
nimodinstsystemtests	73.85% <ø> (ø)
nimodinstunittests	94.20% <ø> (ø)
nirfsgsystemtests	82.40% <ø> (ø)
niscopesystemtests	92.94% <ø> (ø)
niscopeunittests	43.20% <ø> (ø)
nisesystemtests	91.50% <ø> (ø)
niswitchsystemtests	82.03% <ø> (ø)
nitclksystemtests	94.87% <ø> (ø)
nitclkunittests	98.26% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.
see 1 file with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f83c4a2...f197483. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[ni-jfitzger]

What are all these filemode changes?

[rahur-NI]

What are all these filemode changes?

Filemode changes got added automatically though there were no changes specifically. I have updated the PR to show up only changes related to setuptools

[ni-jfitzger]

This contribution adheres to CONTRIBUTING.md.

Should be checked off, not crossed out.