Rollup merge of #94730 - msabansal:sabansal/b-atomic-mut-ptr, r=Dylan-DPC

Rollup merge of #94730 - msabansal:sabansal/b-atomic-mut-ptr, r=Dylan-DPC

Reverted atomic_mut_ptr feature removal causing compilation break

Fixes a regression introduced as part of https://github.com/rust-lang/rust/pull/94546

Std no longer compiles on nightly while using the following commnd:

export RUSTFLAGS='-C target-feature=+atomics,+bulk-memory'
cargo build --target wasm32-unknown-unknown -Z build-std=panic_abort,std

I can help add tests to avoid future breaks but i couldn't understand the test framework