Clarified the use of custom installation options #8426

Job	Run time
Preliminary configuration	2s
build (auth-service)	22m 48s
build (cert-creator)	26s
liqoctl (linux, arm64)	5m 25s
build (crd-replicator)	18m 33s
liqoctl (linux, amd64)	5m 29s
build (liqo-controller-manager)	25m 6s
liqoctl (windows, amd64)	4m 23s
build (discovery)	15m 36s
liqoctl (darwin, arm64)	4m 53s
build (liqonet)	28m 21s
liqoctl (darwin, amd64)	4m 25s
build (uninstaller)	13m 19s
build (virtual-kubelet)	24m 0s
build (metric-agent)	15m 1s
build (telemetry)	15m 54s
build (proxy)	16s
post-build	3s
release	0s
e2e-test-trigger	0s
	3h 24m 0s

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