[DEPRECATION] Added deprecation note about the csrf_provider and intention options.

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #12610 
| License       | MIT
| Doc PR        |
Could you please keep it on 1 line