Add Python 3.14t HIR expectations to RuntimeTests

Summary: Update RuntimeTests to identify free-threaded Python builds with the 3.14t suffix when selecting and updating HIR expectations. Add dedicated expectations for eight HIRBuilderStaticTest cases while preserving the existing Python 3.14 expectations. Runtime assertion failures in the remaining four tests are unchanged and out of scope.

Reviewed By: alexmalyshev

Differential Revision: D113893113

fbshipit-source-id: 003dea13de508da1cc02f0743f4624d191a863bf

Author: yoney