BZ1850510 - Update all_squash mount options

[bobfuru]

BZ1850510 - This is an update to #24276 and is in response to a new comment by the requestor that root_squash should be all_squash (https://bugzilla.redhat.com/show_bug.cgi?id=1850510#c19).

@huffmanca - PTAL. I'm not sure how I would address Alex's other option besides all_squash:

or the image_registry need to be adjusted in some way with a group which is dynamic in a sense that on a container restart/recreation will be modified.
Do you think changing to all_squash is a sufficient recommendation in this NFS note?

@qinpingli - PTAL for QE.

[openshift-docs-preview-bot]

The preview will be available shortly at:

• https://BZ1850510--ocpdocs.netlify.com/

[qinpingli]

@wzheng1 Could you help take a look?

[wzheng1]

@dmage @ricardomaraschini My case is using "no_root_squash" to test, I am not sure whether "root_squash" works, could you please confirm?

[dmage]

I cannot confirm. Initially we had no_root_squash, and we tested it with no_root_squash.

@huffmanca why did we change it?

[bobfuru]

@huffmanca - wondering if you have any insights to share, also waiting to find out from Alex Gurenko if his attempts were successful to use root_squash + the supplementalGroup.

[bobfuru]

I'm going to close this PR. We have since updated image registry docs to remove NFS references, including these instructions to use supplementalGroup and root_squash.