utils/gems: handle mismatching EUID and UID for bundle installs #28126

Job	Run time
syntax	1m 3s
cask audit	2m 42s
vendored gems	35s
tap syntax	12m 15s
formula audit	6m 29s
docker	4m 37s
tests (online)	8m 48s
update-test (Ubuntu 22.04)	37s
tests (generic OS)	6m 18s
test default formula (Ubuntu 22.04)	4m 19s
update-test (macOS 13)	56s
tests (Ubuntu 22.04)	6m 22s
tests (Ubuntu 20.04)	6m 34s
test default formula (Ubuntu 20.04)	5m 30s
tests (macOS 13 x86_64)	6m 34s
test default formula (macOS 13 x86_64)	3m 35s
tests (macOS 14 arm64)	4m 57s
test default formula (macOS 14 arm64)	1m 23s
	1h 23m 34s

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