[Security] Fix usage of unexistent method in DoctrineAclCache.
bug #11860 [Security] Fix usage of unexistent method in DoctrineAclCache. (mauchede)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #11860).

Discussion
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[Security] Fix usage of unexistent method in DoctrineAclCache.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #10328
| License       | MIT
| Doc PR        |

The method `deleteByPrefix` does not exist. I replaced it by `deleteAll`: as @guilhermeblanco said, this method is not available in the interface `Cache` but it is present in the abstract class `CacheProvider`.

Commits
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131abd8 [Security] Fix usage of unexistent method in DoctrineAclCache.