Add privacy notice display validation to frontend

[allisonking]

If you're creating a PrivacyNotice with opt_in consent mechanism, displayed_in_overlay must be True. displayed_in_privacy_center can be True or False, nothing to check here.

• displayed_in_overlay should be toggled ON and disabled so that it can't be changed
• all other toggles can be toggle-able

If you're creating a PrivacyNotice with opt_out consent mechanism, either displayed_in_overlay or displayed_in_privacy_center must be True right now.

• add validation that either displayed_in_overlay or displayed_in_privacy_center is checked

If you're creating a privacy notice with notice_only consent mechanism, displayed_in_overlay must be True.

• displayed_in_overlay should be toggled ON and disabled so that it can't be changed
• all other toggles can be toggle-able

See https://github.com/ethyca/fides/issues/3153 for original context