Bash scripts distributed with Windows toolchians

[ChrisDenton]

On Windows (including msvc since 1.85) We currently distribute distribute the following extension-less bash scripts to run debuggers: rust-gdb, rust-gdbgui and rust-lldb, However, this currently breaks rustup and fixing this is non-trivial because there isn't a native way to run bash scripts.

Distributing these seems to be an accidental side-effect of distributing the py files. I would suggest either:

• remove the bash scripts entirely
• create .bat alternatives (or maybe powershell)

[ChrisDenton]

We do already have rust-windbg.cmd which is a batch script. However, that's not one of the executables that rustup proxies.