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chore(deps): Drop use of `once_cell::{sync,unsync}::OnceCell` (#17621)

* chore(deps): Drop use of `once_cell::{sync,unsync}::OnceCell`

This is now part of `std::cell` and `std::sync`. This bumps the MSRV to 1.70.0
which is when those features were stabilized.

* Fix `const fn` lint

* Another const lint

* Fix more uses

* Deny `once_cell::sync::OnceCell` with clippy
B
Bruce Guenter committed
f2cd59ad048c9b867e240cc29e92de1cbffc2d5b
Parent: c07c99d
Committed by GitHub <noreply@github.com> on 8/30/2023, 6:27:28 PM