[Cache] Fixed not supported Redis eviction policies

[SerheyDolgushev]

Q	A
Branch?	4.4
Bug fix?	yes
New feature?	no
Deprecations?	no
Tickets	no
License	MIT
Doc PR	no

Steps to reproduce:

1. Define the following redis service on SymfonyCloud:

rediscache:
    type: redis:5.0
    size: S
    configuration:
        maxmemory_policy: allkeys-lru

2. Deploy the change

Expected result:
No redis cache will be populated

Actual result:
Following exception is thrown:

[2020-04-28T05:35:58.440403-04:00] php.CRITICAL: Uncaught Error: Return value of Symfony\Component\Cache\Adapter\RedisTagAwareAdapter::doSave() must be of the type array, bool returned {"exception":"[object] (TypeError(code: 0): Return value of Symfony\\Component\\Cache\\Adapter\\RedisTagAwareAdapter::doSave() must be of the type array, bool returned at /app/vendor/symfony/cache/Adapter/RedisTagAwareAdapter.php:100)"} []

[SerheyDolgushev]

@nicolas-grekas rebased onto 4.4

[nicolas-grekas]

Thank you @SerheyDolgushev.