feat(build-library): use uv build when use-uv is true

[viseshrp]

When use-uv: true (the default), the build step now uses uv build instead of python -m build, avoiding the need to install the build package as a separate dependency and also speeding up builds at the same time. The python -m build path is fully preserved when use-uv: false.

Changes:

Skip installing the build package when use-uv: true (only twine is needed for validation)
Run uv build --out-dir dist instead of python -m build --outdir dist when use-uv: true

[klmcadams]

This makes sense to me, thanks!

[SMoraisAnsys]

LGTM, if work associated to astral-sh/uv#8641 get handled, we might even get rid of twine on this workflow

[MaxJPRey]

LGTM. Thanks @viseshrp for the contribution.