Validate gem name before building compact index cache paths #8976

Job	Run time
Rubygems on macOS (3.2)	1m 50s
Rubygems on macOS (4.0)	2m 38s
Rubygems on Ubuntu (3.2)	2m 1s
Rubygems on Windows (3.2)	5m 4s
Rubygems on Ubuntu (3.3)	1m 53s
Rubygems on macOS (3.3)	2m 25s
Rubygems on Windows (4.0)	6m 24s
Rubygems on macOS (3.4)	4m 0s
Rubygems on Ubuntu (4.0)	2m 16s
Rubygems on Ubuntu (3.4)	5m 0s
Rubygems on Windows (3.4)	3m 52s
Rubygems on Windows (3.3)	4m 32s
Rubygems on Ubuntu (4.0 (psych))	2m 19s
Rubygems on Windows (no symlinks)	5m 44s
Rubygems on macOS (jruby)	8m 8s
Rubygems on Ubuntu (jruby)	9m 28s
Rubygems on macOS-intel (4.0)	3m 20s
Rubygems on Windows (jruby)	13m 51s
Rubygems on Ubuntu (truffleruby)	3m 36s
All rubygems jobs pass	4s
	1h 28m 25s

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