fix(.github/codecov): Install golang for fips codecov

[dongcarl]

An attempt to fix https://github.com/quinn-rs/quinn/actions/runs/11562272211/job/32183071070 on main and (unreleased) 0.5.6

[dongcarl]

It seems from the CI failure that code coverage builds for Windows for aws-lc-fips-sys is more complicated than expected.

More resources:

• https://github.com/aws/aws-lc/blob/main/BUILDING.md#build-prerequisites (seems to recommend ninja, nasm, cmake, and libunwind)

@mxinden @Ralith @djc I guess a decision has to be made if full coverage for aws-lc-fips-sys is worth the build system troubles

[djc]

What goal are you trying to achieve here?

[dongcarl]

@djc Just to fix https://github.com/quinn-rs/quinn/actions/runs/11562272211/job/32183071070

[djc]

@mxinden @Ralith @djc I guess a decision has to be made if full coverage for aws-lc-fips-sys is worth the build system troubles

I think we should definitely fix it so coverage builds can succeed (I'm surprised the main CI failures don't generate any notifications for me...). I think rustls has this working so it shouldn't be too hard to fix?

https://github.com/rustls/rustls/blob/main/.github/workflows/build.yml#L51