[1.0.0] Properly react to alias dereferencing requests. It's not supported (for now).

[ChadSikorra]

Alias dereferencing is not supported on the backend. This at least detects if it was requested and produces a proper result code rather than straight up ignoring it. I'm not sure I actually want to add alias dereferencing to the backend, as it seems like it adds a lot of complexity and the use case for it seems narrow.

[codecov]

Codecov Report

❌ Patch coverage is 91.54930% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.58%. Comparing base (e77ce88) to head (a89f8af).

Files with missing lines	Patch %	Lines
.../Server/Backend/Storage/WritableStorageBackend.php	86.84%	5 Missing ⚠️
...eDSx/Ldap/Server/Backend/Storage/AliasDetector.php	88.88%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #175   +/-   ##
=========================================
  Coverage     88.57%   88.58%           
- Complexity     4998     5018   +20     
=========================================
  Files           425      426    +1     
  Lines         17548    17613   +65     
=========================================
+ Hits          15543    15602   +59     
- Misses         2005     2011    +6     

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