Bug: BackedEnumFilter does not support integer-backed enums (e.g. enum Status: int)

[MeronNagy]

API Platform version(s) affected: 4.1.7

Description
The built-in BackedEnumFilter does not support enums backed by integers. When attempting to filter using such enums, API Platform logs "Invalid filter ignored" and the filter is not applied.

How to reproduce
Minimal reproduction repo: https://github.com/MeronNagy/api-platform-integer-backed-enum
Includes a working and non-working example with full README instructions.

Possible Solution
Converting string $value to integer in the normalizeValuefunction in BackendFilterTrait.
I will link a PR shortly.

Solved:
#7127