Update apex_comparison_test.sh to support CFI

The CFI transition being applied creates a situation where Bazel
clears its convenience symlinks. This change points the script
directly to the location of the deapexer artifact instead of the
symlink.

Bug: 261733820
Test: Ran the tests
Change-Id: I23951f0fe75ce1fbc3c0dd969244a797ac1ff983