Disable coverage checks for min Bazel version jobs

[UebelAndre]

#2079

[scentini]

Should we consider bumping up the min supported Bazel to 6.3?
#2072 is also a change that fails on 6.0, albeit for that one we can ask to make it compatible with both 6.0 and 6.3.

[UebelAndre]

Should we consider bumping up the min supported Bazel to 6.3? #2072 is also a change that fails on 6.0, albeit for that one we can ask to make it compatible with both 6.0 and 6.3.

I'm actually not sure this should be merged. I saw here a job that didn't produce any coverage and it ran on 6.3.0. This issue feels like an issue in Bazel itself so I opened bazelbuild/bazel#19098. I definitely don't want CI to be flaking but I highly value the ability to generate coverage reports for Rust code and don't want this to regress.