RCO release 0.8.2

[leochr]

• Include the fix for the pull secret issue (Check for secrets only if service account pull secrets exist #377)
• Switch sample app to icr.io/appcafe/open-liberty/samples/getting-started
• Update version to 0.8.2
• Enable minikube tests

[Elyytscha]

Hello,

would it be possible to integrate also #359 in 0.8.2, we can't upgrade our runtime component safely when we have to patch those limits manually, our actual rco instance was using about ~350 MB Ram constantly last week.

[leochr]

@idlewis please include #359 in 0.8.2, thanks

[leochr]

@idlewis please add change log and kubectl and kustomize artifacts (under deploy/releases/0.8.2). Reference PR for 0.8.1 release: https://github.com/application-stacks/runtime-component-operator/pull/338/files