Add option to customize progress bar rounding #7851

Job	Run time
Format + check + test	5m 27s
android	27s
cargo-deny aarch64-apple-darwin	40s
cargo-deny aarch64-linux-android	43s
Check wasm32 + wasm-bindgen	2m 34s
cargo-deny i686-pc-windows-gnu	41s
Check Windows	2m 23s
cargo-deny i686-pc-windows-msvc	40s
cargo-deny i686-unknown-linux-gnu	39s
cargo-deny wasm32-unknown-unknown	40s
cargo-deny x86_64-apple-darwin	38s
cargo-deny x86_64-pc-windows-gnu	43s
cargo-deny x86_64-pc-windows-msvc	39s
cargo-deny x86_64-unknown-linux-gnu	41s
cargo-deny x86_64-unknown-linux-musl	38s
cargo-deny x86_64-unknown-redox	41s
	18m 54s

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