Upgrade to v3.4.0

Majority of the changes were from pulling in the upstream chart. But, I did update the following items:

• Modified all non-upstream resources to use {{ .Release.Namespace }} vs gatekeeper-system. This aligns with what the upstream chart did.
• Turned off the postInstall labeling in values.yaml. This uses a new container which is not Iron Bank approved to label the Namespace. Big Bang already labels the namespace appropriately.
• Removed deprecated createNamespace value
• Updated docs/ConstraintTemplates with latest list of constraints
• Added common labels to all big bang components

Related to #2 (closed)