index_abort_before_commit_signal.js is a test introduced in SERVER-48197. This test uses a fail point in code that reads the commit quorum, which is only applicable to two phase index builds. In the 4.4 branch, we still run some test suites with the two phase index build support disabled (see single phase index builds).

This test should be updated in the 4.4 branch to detect and require support for two phase index builds.