refactor: extract dereference/validate pipeline from reconcile #204

Job	Run time
Detect relevant changed files	8s
Build/Publish amd64 Image	7m 59s
Run cargo-udeps	2m 24s
Build/Publish arm64 Image	6m 58s
Publish/Sign 0.0.0-pr836 Index	35s
Package/Publish 0.0.0-pr836 Helm Chart	28s
Run OpenShift Preflight Check for 0.0.0-pr836-amd64	17s
Run OpenShift Preflight Check for 0.0.0-pr836-arm64	19s
Failure Notification	0s
Finished Build and Publish	2s
	19m 10s

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