Removed anycast functionality from traffic control

[rimashah25]

Reverting changes in #7302

---

Which Traffic Control components are affected by this PR?

• Traffic Monitor

What is the best way to verify this PR?

TM should work as expected.

If this is a bugfix, which Traffic Control versions contained the bug?

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

Attention: 16 lines in your changes are missing coverage. Please review.

Comparison is base (fa231d7) 65.64% compared to head (0248c37) 31.83%.

❗ Current head 0248c37 differs from pull request most recent head 915e6ad. Consider uploading reports for the commit 915e6ad to get more accurate results

Files	Patch %	Lines
traffic_monitor/datareq/crstate.go	0.00%	11 Missing ⚠️
traffic_monitor/health/cache.go	33.33%	4 Missing ⚠️
traffic_monitor/datareq/datareq.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             master    #7877       +/-   ##
=============================================
- Coverage     65.64%   31.83%   -33.81%     
  Complexity       98       98               
=============================================
  Files           323      719      +396     
  Lines         12836    82714    +69878     
  Branches        970      970               
=============================================
+ Hits           8426    26335    +17909     
- Misses         4050    54221    +50171     
- Partials        360     2158     +1798     

Flag	Coverage Δ
golib_unit	53.86% <ø> (?)
grove_unit	12.02% <ø> (?)
t3c_unit	5.88% <ø> (?)
traffic_monitor_unit	25.47% <15.78%> (?)
traffic_ops_unit	21.68% <ø> (?)
traffic_portal_v2	74.30% <ø> (-0.06%)	⬇️
traffic_stats_unit	10.78% <ø> (?)
unit_tests	29.15% <15.78%> (-45.20%)	⬇️

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[zrhoffman]

Just one comment about the changelog, otherwise it looks good. Thanks!