[WIP] pkg/helm: custom storage backend per CR with ownerref

[joelanford]

Description of the change:

This PR replaces the in-memory storage driver with a new custom storage driver that aligns with the primary design proposals for helm v3 storage:

• Store the release state objects in the same namespace as the CR and release
• Use secrets to store release state
• Add owner references to release secrets

Motivation for the change:

• To align with the direction of Helm 3
• To support the possibility of different charts using the same name in the same scope (see Predictable Release Names with the Helm Operator SDK #1094)

This PR is an alternative to and would resolve the motivation for #917, the goal of which is to persist release state as cluster resources rather than use Helm's in-memory storage backend.

[openshift-ci-robot]

@joelanford: PR needs rebase.

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[openshift-bot]

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[openshift-ci-robot]

@joelanford: The following tests failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
ci/prow/e2e-aws-ansible	02bcf76	link	/test e2e-aws-ansible
ci/prow/images	02bcf76	link	/test images

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[joelanford]

This is mostly OBE. The only additional feature of this PR that isn't already present is the addition of owner references on the release secrets, pointing the to CR that controls the release.

We'll likely re-evaluate this with Helm 3 (which will require a different changeset anyway).