APIv4 - Fix resolving pseudoconstants for less-permissioned users

[colemanw]

Overview

Fixes dev/core#3750, with test.

[civibot]

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[agileware-justin]

• General standards
  • Explain (r-explain)
    • PASS : Problem described in https://lab.civicrm.org/dev/core/-/issues/3750
  • User impact (r-user)
    • PASS: The change would be unnoticeable for a majority of users who work with this feature.
  • Documentation (r-doc)
    • PASS: Changes do not require documentation - it is expected functionality.
  • Run it (r-run)
    • PASS: PR works correctly when applied to CiviCRM 5.51.1
• Developer standards
  • Technical impact (r-tech)
    • PASS: The change preserves compatibility with existing callers/code/downstream.
  • Code quality (r-code)
    • PASS: The functionality, purpose, and style of the code seems clear+sensible.
  • Maintainability (r-maint)
    • PASS: The change sufficiently improves test coverage, or the change is trivial enough that it does not require tests.
  • Test results (r-test)
    • PASS: The test results are all-clear.

[agileware-justin]

Thanks again @colemanw

[agileware-justin]

#readytomerge