[DRAFT] Update Rust toolchain to 2022-12-04

[adpaco]

Description of changes:

Conform with changes from:

• Make rustc_target usable outside of rustc rust-lang/rust#103693
• Add ConstKind::Expr rust-lang/rust#99798
• Rename ast::Lit as ast::MetaItemLit. rust-lang/rust#104804

Resolved issues:

Fixes#1977

Call-outs:

Testing:

• How is this change tested?

• Is this a refactor change?

Checklist

• Each commit message has a non-empty body, explaining why the change was made
• Methods or procedures are documented
• Regression or unit tests are included, or existing tests cover the modified code
• My PR is restricted to a single feature or bugfix

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 and MIT licenses.

[adpaco]

Closing in favor of #2045