[0.2] Fix rustc version when clippy-driver
is used
#3904
Merged
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The first commit is a combined cherry-pick of the following two commits:
rustc_version_cmd
")These two commits are squashed for the backport to slightly reduce the amount of conflict resolution needed going forward (some small tweaks were still needed).
This backports the following:
clippy-driver
used #3893rustc_version_cmd
#3903