ci: run go steps for any change in go sub dirs

Created by: keegancsmith

Non go files can also affect the outcome of go build (embed) and go test (testdata). We hardcode a list of directories which mostly contain go code and run go steps if a change includes them.

A recent example of this is where I only modified a file we go:embed which caused the tests to fail. However, CI did not run the tests on the PR leading to a failure on main.

Test Plan: go test