feat!: Remove `PartialEq` impl for `ConstF64` #648

Job	Run time
Check for changes in Rust files	16s
benches	1m 45s
check	57s
tests (Rust stable, all features)	1m 17s
tests (Rust stable, no features)	1m 27s
tests (Rust 1.75)	1m 37s
tests (Rust beta)	1m 28s
tests (Rust nightly)	1m 14s
Required checks 🦀	1s
coverage	2m 11s
	12m 13s

Provide feedback