chore(deps): update rust crate which to v7 (dev)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
which	dependencies	major	4 -> 7

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Release Notes

harryfei/which-rs (which)

v7.0.1

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• Get user home directory from env_home instead of home. Thanks @​micolous for this contribution!
• If home directory is unavailable, do not expand the tilde to an empty string. Leave it as is.

v7.0.0

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• Add support to WhichConfig for a user provided closure that will be called whenever a nonfatal error occurs.
  This technically breaks a few APIs due to the need to add more generics and lifetimes. Most code will compile
  without changes.

v6.0.3

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• Enhance tracing feature with some debug level logs for higher level logic.

v6.0.2

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• Add tracing feature which outputs debugging information to the tracing ecosystem.

v6.0.1

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• Remove dependency on once_cell for Windows users, replace with std::sync::OnceLock.

v6.0.0

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• MSRV is now 1.70
• Upgraded all dependencies to latest version

v5.0.0

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• Remove several unused error messages
• Windows executables can now be found even if they don't have a '.exe' extension.
• Add new error message, Error::CannotGetCurrentDirAndPathListEmpty

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