Mattermost-minio tenant access denied which caused bucket creation failed

Summary

In Minio main branch, mattermost tenant has access denied issue which doesn't look to be related to Minio.

Research and fix the issue in Mattermost-minio tenant that displayed warning: Bucket creation failed: Access Denied.

Steps to reproduce

Deploy Minio, Minio-operator and mattermost in k3d.

What is the current behavior?

in Mattermost-minio tenant that displayed warning: Bucket creation failed: Access Denied.

What is the expected behavior?

kubectl get tenant -A should show mattermost to be in green Health and Initialized state.

Relevant logs and/or screenshots

(Paste any relevant logs - please use code blocks (```) to format console output, logs, and code as it's very hard to read otherwise.)

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)

/cc {put CODEOWNERs @githandles here}