Simplify NotFoundRedirectConfigInterface with property hooks and asymetric visibility

[acelaya]

With PHP 8.4 as the minimum version, NotFoundRedirectConfigInterface can now define properties that implementors can define as readonly or private(set), avoiding the requirement for extra public methods.

[codecov]

Codecov Report

❌ Patch coverage is 81.25000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.81%. Comparing base (a731e01) to head (c42fb67).
⚠️ Report is 4 commits behind head on develop.

Files with missing lines	Patch %	Lines
...ore/src/Config/Options/NotFoundRedirectOptions.php	0.00%	3 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #2529      +/-   ##
=============================================
+ Coverage      93.75%   93.81%   +0.06%     
+ Complexity      1724     1703      -21     
=============================================
  Files            279      278       -1     
  Lines           5600     5563      -37     
=============================================
- Hits            5250     5219      -31     
+ Misses           350      344       -6     

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