fix: add rook-ceph upstream provisioner string to unsupported providers

[solacelost]

What this PR does / why we need it:
This PR adds the upstream rook-ceph RGW StorageClass bucket provisioner to the compiled-in hashmap of unsupported provisioners for the purposes of metrics reporting.

For additional detail, see discussion on #3166

Special notes for your reviewer:
I also separated out the ODF/OCS RGW StorageClass into a dedicated const so that Noobaa is consistent.

Release note:

Improve metrics reporting behavior for upstream rook-ceph deployments, identifying RGW bucket provisioners

[kubevirt-bot]

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[akalenyu]

Looks good! thanks
/test all

[solacelost]

Up to you whether you want to merge this or lump it in with CNV-37744 @arnongilboa - no hard feelings if you just close :)

[arnongilboa]

/lgtm

[awels]

/approve

[kubevirt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: awels

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[akalenyu]

/test pull-containerized-data-importer-e2e-upg