fix: improve retrying of dying pooled connections #424

Job	Run time
semver	23s
Check Style	5s
features	49s
Check MSRV (1.63)	1m 48s
Test with Miri	48s
Test stable on ubuntu-latest	30s
Test stable on windows-latest	2m 30s
Test stable on macos-latest	27s
Test beta on ubuntu-latest	37s
Test beta on windows-latest	1m 20s
Test beta on macos-latest	38s
Test nightly on ubuntu-latest	32s
Test nightly on windows-latest	1m 22s
Test nightly on macos-latest	57s
Build docs	12s
CI is green	1s
	12m 59s

Provide feedback