adapt for gcc 14.3 toolchain

[howea]

rust-activation 1.89 (rebuild for gcc 14.3 toolchain)

Destination channel: defaults

Links

• PKG-11607
• conda-forge repo: https://github.com/conda-forge/rust-activation-feedstock
• corresponding rust PR: Adapting for 14.3 gcc toolchain rust-feedstock#23

Explanation of changes:

• Rebuilding for gcc 14.3 toolchain.
• changed reference to compiler executable in a test script and the activation script. The compiler executable was duplicated under two names in previous 11.2 build, but only one name in 14.3 build.