refactor: Change concurrency approach #356

Job	Run time
Android Build Only (aarch64-linux-android)	1m 11s
Android Build Only (armv7-linux-androideabi)	3m 42s
Cross Test (i686-unknown-linux-gnu)	1m 19s
Cross Build Only (x86_64-unknown-freebsd)	51s
Checking docs	59s
Minimal Supported Rust Version	1m 25s
cargo deny	27s
clippy_check	1m 46s
CI Test Suite / Tests (ubuntu-latest, stable, none)	1m 39s
check_semver	1m 20s
Checking fmt	28s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	1m 44s
codespell	5s
CI Test Suite / Tests (ubuntu-latest, stable, all)	1m 42s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	1m 59s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	2m 12s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	1m 32s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	1m 49s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	1m 56s
CI Test Suite / Tests (ubuntu-latest, stable, default)	1m 17s
	29m 23s

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