Is your feature request related to a problem? Please describe.
See https://go-review.googlesource.com/c/go/+/422235

The unified experiment leads to better inlining of generic code. It will be on by default in go1.20. We should build cockroach with it enabled.

Additional context
The rules_go bazel package has made this easier lately. We need to update to pick up that convenience.

Jira issue: CRDB-22633