Rust

Change `Harness::run` to run until no more repaints are requested #13964

Job	Run time
android	27s
cargo-deny aarch64-apple-darwin	39s
Check wasm32 + wasm-bindgen	2m 27s
cargo-deny aarch64-linux-android	39s
Check wasm32+atomics	1m 22s
Format + check + test	2m 32s
cargo-deny i686-pc-windows-gnu	37s
cargo-deny i686-pc-windows-msvc	41s
ios	21s
Run tests	2m 16s
cargo-deny i686-unknown-linux-gnu	40s
Check Windows	1m 17s
cargo-deny wasm32-unknown-unknown	38s
cargo-deny x86_64-apple-darwin	37s
cargo-deny x86_64-pc-windows-gnu	37s
cargo-deny x86_64-pc-windows-msvc	37s
cargo-deny x86_64-unknown-linux-gnu	37s
cargo-deny x86_64-unknown-linux-musl	36s
cargo-deny x86_64-unknown-redox	39s
	18m 19s

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