Rust

Change `Harness::run` to run until no more repaints are requested #13965

Job	Run time
Check wasm32 + wasm-bindgen	2m 38s
Format + check + test	2m 32s
android	28s
cargo-deny aarch64-apple-darwin	38s
cargo-deny aarch64-linux-android	37s
cargo-deny i686-pc-windows-gnu	36s
cargo-deny i686-pc-windows-msvc	38s
cargo-deny i686-unknown-linux-gnu	38s
cargo-deny wasm32-unknown-unknown	39s
cargo-deny x86_64-apple-darwin	36s
cargo-deny x86_64-pc-windows-gnu	37s
cargo-deny x86_64-pc-windows-msvc	37s
cargo-deny x86_64-unknown-linux-gnu	38s
cargo-deny x86_64-unknown-linux-musl	37s
cargo-deny x86_64-unknown-redox	39s
Check wasm32+atomics	1m 23s
ios	21s
Run tests	2m 20s
Check Windows	2m 6s
	19m 18s

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