Vectorize SearchSpace membership check

[sunnyshen321]

Summary:
Changes:

• Added validate_array method to all Parameter classes for reusable vectorized validation
• Added check_membership_df method to SearchSpace class for batch membership checking on DataFrames
• Null values handling consistent with existing validate() and check_membership() methods

Differential Revision: D90637436

[meta-codesync]

@sunnyshen321 has exported this pull request. If you are a Meta employee, you can view the originating Diff in D90637436.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 95.69892% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 96.72%. Comparing base (a663f58) to head (7d4b840).

Files with missing lines	Patch %	Lines
ax/core/search_space.py	93.18%	3 Missing ⚠️
ax/core/parameter.py	95.65%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4762   +/-   ##
=======================================
  Coverage   96.72%   96.72%           
=======================================
  Files         582      582           
  Lines       60748    60839   +91     
=======================================
+ Hits        58758    58848   +90     
- Misses       1990     1991    +1     

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