feature #47890 [SecurityBundle] Deprecate the enable_authenticator_manager option (chalasr)

This PR was merged into the 6.2 branch.

Discussion
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[SecurityBundle] Deprecate the `enable_authenticator_manager` option

| Q             | A
| ------------- | ---
| Branch?       | 6.2
| Bug fix?      | no
| New feature?  | no
| Deprecations? | yes
| Tickets       | -
| License       | MIT
| Doc PR        | -

Last step before we close the chapter in 7.0 🎉

Commits
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0a826d037a [SecurityBundle] Deprecate the `enable_authenticator_manager` option

Author: fabpot

Tests/Functional/app/Security/config.yml

@@ -8,8 +8,6 @@ services:
             - container.service_subscriber
 
 security:
-    enable_authenticator_manager: true
-
     providers:
         main:
             memory: