Fix 2 bugs in the OCI integration

Improve resilience of diskTypes requests.

Remove outdated GCE cloudprovider owners

…intsTesting

Add unit test for cleaning deletion soft taint in scale down cool down

…Group

Also consider containerStatus.resources when handling container resources

…y-sts-to-drain

Allow draining when StatefulSet kind has custom API Group

…ller

This commit instruments the `observer`, used within the `recommender`
e2e tests, reuse the test framework namespace. The main reason behind
this change is to allow running the test suite against an existing
cluster that already has `VPA` resources in other namespaces.

Currently, the test is considering all `namespaces` when it builds it's
`observer`'s controller, which makes the test fail when trying to validate
the recommendations for components outside of the test scope.

This behavior was discovered while running the e2e tests against a
cluster with VPA setup that uses Prometheus as history storage
provider.

…bserver-reuse-test-framework-namespace

e2e(recommender): Restrict the internal `VPA` controller scope to test namespace

…-metric

Emit scale down metric even when there is no scale down candidates.

…caleDownInCooldown signature.

…down-signature

Patch TestCleaningSoftTaintsInScaleDown to be compatible with new isScaleDownInCooldown signature