change build test name from 'need_test' to 'build_only'

[uberzzr]

What version of rules_go are you using?

0.38.0

What version of gazelle are you using?

0.29.0

What version of Bazel are you using?

6.0.0-homebrew

Does this issue reproduce with the latest releases of all the above?

Yes

What operating system and processor architecture are you using?

Mac OS
arm64

Any other potentially useful information about your toolchain?

No

What did you do?

We add build_test target since we cannot run tests in those packages, while the name need_test is confusing. To make it more clearly, I changed the name from need_test to build_only.

What did you expect to see?

bazel test works fine with all the test targets

What did you see instead?

The bazel test works successfully with all the packages that were excluded, except packages with /internal/ or /testdata/ in its path.