fix(api-machinery): Fixes patching for unstructured objects

HELM DOC TYPO

CRDs and other objects seen as unstructured cannot use strategic
merge patching. It has never been supported on CRDs. Previously,
cases like unstructured objects could have caused an unregistered
error. This is no longer the case.

This change explicitly looks for unstructured objects and handles
those using json merge patching.

Closes #3382

fix helm init --upgrade logic

Fix pod recreation

Update developers.md

Update charts_tips_and_tricks.md to fix typo error

Fix subchart2 example tag

typo error
comand --> command

docs: fixed incorrect clone path in developer docs

refs #3173: add appsv1beta1 and appsv1beta2 apiVersion 

fix doc some spell check

Disambiguate encoding from secrets

the spell check

Update RBAC best practices

exit zero on non-master branch

Fix release checklist

Fix typo

While we still don't want to upload to GCS/GCR, we also don't want the CI run to fail because we are just skipping the step. This is most usually seen in the `release-X.Y` branches cut every minor release.

also add it to the release checklist.

the release branch was of the format `release-vX.Y.Z` when it should be `release-X.Y`.

bump version to v2.8.0

(cherry picked from commit 14af25f1)

In docs/developers.md the clone path for helm was given as $GOPATH/k8s.io.
This has been changed to $GOPATH/src/k8s.io.

Closes #3387

fix link to image