Update Tomcat to 9.0.91

[zrhoffman]

This PR

• Updates the build system, trafficrouter in CDN in a Box for Developers, Traffic Router GitHub Actions, and the the CDN in a Box makefile to get the Tomcat version from .env
• Updates the Tomcat version in .env to 9.0.90.

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Which Traffic Control components are affected by this PR?

• Build system
• Traffic Router
• CDN in a Box
• Automation - GitHub Actions

What is the best way to verify this PR?

Verify the GitHub Actions pass

PR submission checklist

• This PR has tests
• This PR has documentation
• This PR has a CHANGELOG.md entry
• This PR DOES NOT FIX A SERIOUS SECURITY VULNERABILITY (see the Apache Software Foundation's security guidelines for details)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 29.03%. Comparing base (ef3fc6a) to head (3fef177).
Report is 49 commits behind head on master.

Additional details and impacted files

@@              Coverage Diff              @@
##             master    #8040       +/-   ##
=============================================
- Coverage     74.36%   29.03%   -45.34%     
- Complexity        0       98       +98     
=============================================
  Files           121       28       -93     
  Lines          5548      954     -4594     
  Branches        908       90      -818     
=============================================
- Hits           4126      277     -3849     
+ Misses         1351      643      -708     
+ Partials         71       34       -37     

Flag	Coverage Δ
traffic_portal_v2	?
traffic_router_unit	29.03% <ø> (?)
unit_tests	?

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[kdamichie]

LGTM