[KYUUBI #7054] Add server only flag for more server/credentials/frontend/metadata configs

### Why are the changes needed?

Reduce the kyuubi server end configs involved into engine end.

### How was this patch tested?

UT and  code review.
### Was this patch authored or co-authored using generative AI tooling?

No.

Closes #7054 from turboFei/server_only.

Closes #7054

d5855a5 [Wang, Fei] revert kubernetes
b253c33 [Wang, Fei] init

Authored-by: Wang, Fei <fwang12@ebay.com>
Signed-off-by: Wang, Fei <fwang12@ebay.com>

Author: turboFei