Cargo build bug fix.

[Jerryy959]

This pr for running cargo build bug-fix.
This pull request includes changes to the crates/rustc_codegen_nvvm/build.rs file and the rust-toolchain file to re-enable support for a specific target and update the Rust toolchain channel. The most important changes are as follows:

Re-enabling target support:

• crates/rustc_codegen_nvvm/build.rs: Re-enabled the x86_64-unknown-linux-gnu target by uncommenting the corresponding line in the target_to_llvm_prebuilt function.

Logging improvements:

• crates/rustc_codegen_nvvm/build.rs: Added a warning message to log the URL of the prebuilt LLVM being used in the find_llvm_config function.

Toolchain update:

• rust-toolchain: Updated the Rust toolchain channel from nightly-2021-12-04 to nightly-2022-11-22 to use a more recent version.

[adamcavendish]

I'm trying the prebuilt toolchain on Linux (Rocky Linux) and I see that the llvm-config requires libtinfo.so.5. This library is a part of ncurses so we might better either repack or include a shared library into the prebuilt package.

[LegNeato]

I think some other PRs obsoleted this, thank you for the PR!