Reset the queue state between each command buffer on queue submit

[jleibs]

Additionally reset the state of SAMPLE_ALPHA_TO_COVERAGE as part of a queue reset.

The move of reset_state from outside to inside the loop matches the previous behavior here: https://github.com/gfx-rs/gfx/blob/master/src/backend/gl/src/queue.rs#L1142

Given the command encoder assumes a default state this seems to be the only safe behavior to avoiding leaking state between buffers.

Checklist

• Run cargo clippy.
• Run RUSTFLAGS=--cfg=web_sys_unstable_apis cargo clippy --target wasm32-unknown-unknown if applicable.
• Add change to CHANGELOG.md. See simple instructions inside file.

Connections
Link to the issues addressed by this PR, or dependent PRs in other repositories

Description
This is necessary to avoid leaking of alpha-to-coverage between command buffers.

Testing
Confirmed alpha-to-coverage set on one pipeline was no longer leaked to the next in our application.

[emilk]

Build error is an unrelated:

error[vulnerability]: Race Condition Enabling Link Following and Time-of-check Time-of-use (TOCTOU)
    ┌─ /github/workspace/Cargo.lock:212:1
    │
212 │ remove_dir_all 0.5.3 registry+https://github.com/rust-lang/crates.io-index
    │ -------------------------------------------------------------------------- security vulnerability detected
    │
    = ID: RUSTSEC-2023-0018
    = Advisory: https://rustsec.org/advisories/RUSTSEC-2023-0018
    = The remove_dir_all crate is a Rust library that offers additional features over the Rust
      standard library fs::remove_dir_all function.

[Wumpf]

needs back-porting

But this is the backport 😄. The non-backport is #3593
@jleibs can you maybe adjust title to signal that and put a link in? thanks!

[Wumpf]

bump @cwfitzgerald can haz merge? :)