Update module version to v7

[zrhoffman]

This PR fixes #4380 and fixes #6304 by updating the ATC module path from

trafficcontrol/go.mod

Line 1 in 75c3769

module github.com/apache/trafficcontrol

to

trafficcontrol/go.mod

Line 1 in da52e80

module github.com/apache/trafficcontrol/v7

and updates references to the latest ATC Go module around the repo to reference the v7 version. See the git history for the commands used to update files and #4380 (comment) for the motivation for this PR.

Note that this PR does not move any files.

Once this PR is merged, a message will appear at the top of https://pkg.go.dev/github.com/apache/trafficcontrol lik this:

because the latest module will be at https://pkg.go.dev/github.com/apache/trafficcontrol/v7.

---

Which Traffic Control components are affected by this PR?

• Documentation
• Traffic Control Cache Config (T3C, formerly ORT)
• Traffic Control Health Client (tc-health-client)
• Traffic Control Client
• Traffic Monitor
• Traffic Ops
• Traffic Stats
• Grove
• CDN in a Box (Enroller)

What is the best way to verify this PR?

Verify that the 8 non-URL, non-local-path instances of github.com/apache/trafficcontrol/ in the repo that did not have v7/ appended to them. They should stay as-is:

repo=github.com/apache/trafficcontrol/
git ls-files | xargs grep -Fn "$repo" 2>/dev/null | grep -vE "(https://|src/)${repo//./\\.}" | grep -vF "${repo}v7"
blueprints/api.guidelines.md:101:[the ATC library's Alert structure](https://pkg.go.dev/github.com/apache/trafficcontrol/lib/go-tc#Alert).
blueprints/refetch-invalidation.md:291:github.com/apache/trafficcontrol/lib/go-atscfg/regexrevalidatedotconfig_test.go
blueprints/refetch-invalidation.md:298:github.com/apache/trafficcontrol/traffic_ops/traffic_ops_golang/invalidationjobs/invalidationjobs.go
blueprints/refetch-invalidation.md:304:github.com/apache/trafficcontrol/traffic_ops/testing/api/v1/jobs_test.go
blueprints/refetch-invalidation.md:305:github.com/apache/trafficcontrol/traffic_ops/testing/api/v2/jobs_test.go
blueprints/refetch-invalidation.md:306:github.com/apache/trafficcontrol/traffic_ops/testing/api/v3/jobs_test.go
blueprints/refetch-invalidation.md:307:github.com/apache/trafficcontrol/traffic_ops/testing/api/v4/jobs_test.go
CHANGELOG.md:694:- Importing Traffic Ops Go clients via the un-versioned `github.com/apache/trafficcontrol/traffic_ops/client` is now deprecated in favor of versioned import paths e.g. `github.com/apache/trafficcontrol/traffic_ops/v3-client`.

PR submission checklist

• Existing tests are sufficient
• Modified existing 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

Merging #7374 (f5061d8) into master (a6b2954) will decrease coverage by 0.02%.
Report is 5 commits behind head on master.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #7374      +/-   ##
============================================
- Coverage     65.64%   65.62%   -0.02%     
  Complexity       98       98              
============================================
  Files           323      323              
  Lines         12827    12825       -2     
  Branches        965      965              
============================================
- Hits           8420     8417       -3     
  Misses         4048     4048              
- Partials        359      360       +1     

Flag	Coverage Δ
traffic_ops_integration	69.42% <ø> (ø)
traffic_portal_v2	74.34% <ø> (-0.06%)	⬇️
unit_tests	74.34% <ø> (-0.06%)	⬇️
v3	57.79% <ø> (ø)
v4	79.18% <ø> (ø)
v5	78.58% <ø> (ø)

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

Files Changed	Coverage Δ
cache-config/t3c-generate/cfgfile/all.go	62.06% <ø> (ø)
cache-config/t3c-generate/cfgfile/routing.go	84.00% <ø> (ø)
cache-config/t3c-generate/cfgfile/sslkeys.go	0.00% <ø> (ø)
cache-config/t3c-generate/cfgfile/wrappers.go	49.36% <ø> (ø)
cache-config/t3c-generate/config/config.go	0.89% <ø> (ø)
cache-config/t3c-generate/plugin/hello_world.go	9.52% <ø> (ø)
cache-config/t3c-generate/plugin/plugin.go	67.44% <ø> (ø)
cache-config/t3c-generate/t3c-generate.go	0.00% <ø> (ø)
.../t3c-generate/update-to-client/update-to-client.go	0.00% <ø> (ø)

... and 2 files with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[zrhoffman]

Closing in favor of #7814