feat: As a user, I want to just verify the format of the resource configuration without writing to etcd

[soulbird]

Description

WHY:
As a user, I want to just verify the format of the resource configuration without writing to etcd, so that I can write the configuration directly to etcd and be guaranteed to be available.

HOW:
The Admin API can provide a dry-run mode: only verifying whether the resource configuration format is correct, not writing etcd.
Whether dry-run mode is enabled can be determined by adding a request parameter to the existing API

[shreemaan-abhishek]

Fixed by #10065