Bzlmod: allow build_extra_args in gazelle_override

[casuallyhostile]

What version of gazelle are you using?

0.33.0

What version of rules_go are you using?

0.41.0

What version of Bazel are you using?

6.3.2

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

Yes

What operating system and processor architecture are you using?

macOS arm64

What did you do?

I'm taming gazelle with bzlmod and want to pass an build_extra_args to gazelle_override e.g.

go_deps.gazelle_override(
    build_extra_args = ["-exclude=src"],
    path = "github.com/census-instrumentation/opencensus-proto",
)

fixing issue like
census-instrumentation/opencensus-proto#200 (comment)

[fmeum]

This looks reasonable at least at first glance as this can't be pushed into a directive.

@tyler-french What do you think?