restore: Add caching for uid/gid names #167

Job	Run time
Rustfmt	31s
Clippy	26s
Build docs (stable, macos-latest)	39s
Build docs (stable, ubuntu-latest)	30s
Test (stable, macos-latest)	2m 12s
Build docs (stable, windows-latest)	2m 22s
Check Powerset of Features (stable, macos-latest)	1m 47s
Test (stable, ubuntu-latest)	2m 15s
Check Powerset of Features (stable, ubuntu-latest)	41s
Test (stable, windows-latest)	4m 32s
Check Powerset of Features (stable, windows-latest)	1m 54s
Check Powerset of Features (beta, macos-latest)	1m 23s
Check Powerset of Features (beta, ubuntu-latest)	44s
Check Powerset of Features (beta, windows-latest)	3m 29s
Check Powerset of Features (nightly, macos-latest)	4m 57s
Check Powerset of Features (nightly, ubuntu-latest)	3m 21s
Check Powerset of Features (nightly, windows-latest)	10m 59s
Result (CI)	0s
	42m 42s

Provide feedback