[CELEBORN-1748] Deprecate identity provider configs tied with quota

[s0nskar]

What changes were proposed in this pull request?

Deprecate identity configs related with quota –

        "celeborn.quota.identity.provider"
        "celeborn.quota.identity.user-specific.tenant"
        "celeborn.quota.identity.user-specific.userName"

In favour of identity configs independent of quota

        "celeborn.identity.provider"
        "celeborn.identity.user-specific.tenant"
        "celeborn.identity.user-specific.userName"

Why are the changes needed?

Current identity configs are tied with quota but identity should be free of quota because other pieces like tags are also using it. In future other new components can also make use of identity.

Does this PR introduce any user-facing change?

NA

How was this patch tested?

Existing UTs