Remove cargo-profdata in favor of using rust-profdata

[ZeroErrors]

Currently cargo-profdata is the only cargo command that doesn't require a build.
Removing this would mean all cargo commands would require a build target and thus simplify the code as well as making the tool usage more consistent rust-$tool for direct tool usage and no builds, cargo-$tool for tools that utilize a cargo target.

[therealprof]

Sounds good to me, but we might want to consider what to do with #5 first which goes the opposite way.