Add additional documentation for IdP Flow #2433

Job	Run time
govet-sidecar (1.22.x, ubuntu-latest)	1m 35s
govet (1.22.x, ubuntu-latest)	1m 48s
lint (1.22.x, ubuntu-latest)	2m 53s
lint-sidecar (1.22.x, ubuntu-latest)	2m 36s
Shellcheck (1.22.x)	23s
Check for vulnerable dependencies (1.22.x)	33s
Check for vulnerable dependencies in sidecar (1.22.x)	31s
gotest-sidecar (1.22.x, ubuntu-latest)	1m 38s
sidecar (1.22.x, ubuntu-latest)	1m 23s
gotest (1.22.x, ubuntu-latest)	2m 4s
operator (1.22.x, ubuntu-latest)	1m 32s
test-cert-manager (1.22.x, ubuntu-latest)	4m 41s
test-kes (1.22.x, ubuntu-latest)	4m 8s
helm-floor (1.22.x, ubuntu-latest)	2m 57s
helm (1.22.x, ubuntu-latest)	2m 30s
test-policy-binding (1.22.x, ubuntu-latest)	5m 47s
test-tenant (1.22.x, ubuntu-latest)	2m 54s
test-tenant-upgrade (1.22.x, ubuntu-latest)	3m 58s
	43m 51s

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