pull in upstream changes for v5.0.9

Supersedes !71 (closed). Closes #40 (closed).

I also went ahead and did the work to upgrade the minio chart to v5.0.9 in minio!112 (merged). Tested by deploying the upgraded operator and minio instance both alone and with mattermost. Verified mattermost can still save images to minio buckets, and manually copied things into and out of a bucket through a port forward.

Upstream PRs:

• Reformat chart templates with minor property fixes #1647
• feature: option to add volumes and volumeMounts to minio-operator pod #1700
• allow to set console env #1629
• Split Helm chart templates into separate files #1677
• feat: support pdb with v1 and v1beta version to control pod's deletion #1681
• Helm: Adding digest option in Operator image #1706