bazel/version: remove version.cc as a runfile

[rockwotj]

This prevents it from showing up in the packaged tarball for Bazel.

Backports Required

• [x] none - not a bug fix
• [ ] none - this is a backport
• [ ] none - issue does not exist in previous branches
• [ ] none - papercut/not impactful enough to backport
• [ ] v24.3.x
• [ ] v24.2.x
• [ ] v24.1.x

Release Notes

• none

[rockwotj]

This change only effects bazel build, so the cmake unit test failures can be ignored