What does this PR (Pull Request) do?

• This PR is not related to any Issue

This PR makes the Go components of Traffic Control build using Go version 1.17.7 and updates the golang.org/x/ dependencies..

See the Go 1.17.7 release notes:

go1.17.7 (released 2022-02-10) includes security fixes to the crypto/elliptic, math/big packages and to the go command, as well as bug fixes to the compiler, linker, runtime, the go command, and the debug/macho, debug/pe, and net/http/httptest packages. See the Go 1.17.7 milestone on our issue tracker for details.

Which Traffic Control components are affected by this PR?

• CDN in a Box - Enroller
• Grove
• Traffic Control Client (Go)
• Traffic Monitor
• Traffic Ops
• Traffic Ops ORT
• Traffic Stats
• CI tests for Go components

What is the best way to verify this PR?

Run unit tests and API tests. Since this is only a patch-level version update, the only changes were bugfixes. Breaking changes would be unexpected.

The following criteria are ALL met by this PR

• Existing tests are sufficient, no additional tests necessary
• The documentation only mentions the major Go version, no documentation updates necessary.
• The changelog already mentions updating to Go 1.17, no additional changelog message necessary.
• This PR includes any and all required license headers
• This PR does not include a database migration
• This PR DOES NOT FIX A SERIOUS SECURITY VULNERABILITY (see the Apache Software Foundation's security guidelines for details)