Update deprecated setParseAction method calls

[tdilauro]

Description

Replace deprecated setParseAction with newer set_parse_action in the SAML Python DSL parser.

No logic or other changes are included in this PR.

Motivation and Context

While testing #2997, I noticed a lot of deprecation warnings like this one in the output:

src/palace/manager/integration/patron_auth/saml/python_expression_dsl/parser.py:55
  /Users/Shared/src/tpp/circulation/src/palace/manager/integration/patron_auth/saml/python_expression_dsl/parser.py:55: DeprecationWarning: 'setParseAction' deprecated - use 'set_parse_action'
    NEGATION_OPERATOR = Literal("-").setParseAction(lambda _: Operator.NEGATION)

How Has This Been Tested?

All tests continue to pass, both locally and in CI.

Checklist

• N/A I have updated the documentation accordingly.
• All new and existing tests passed.

[jonathangreen]

🚀

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.93%. Comparing base (592b679) to head (ddc61bb).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2998   +/-   ##
=======================================
  Coverage   92.93%   92.93%           
=======================================
  Files         453      453           
  Lines       42957    42957           
  Branches     5989     5989           
=======================================
  Hits        39921    39921           
  Misses       1967     1967           
  Partials     1069     1069           

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