[Flang] Update test to not check for tail calls on debug intrinsics

The recently landed commit c5aeca73 causes debug records to be used by
default; while this mostly has no direct effect on output, one side
effect is that intrinsics are deleted and recreated in memory, which
can change certain properties. This broke a test that expected `tail`
to be set on some debug intrinsics; as this property has no effect on
debug intrinsics, this patch removes the expectation.

Committed without review due to being a trivial test update; if this
needs discussion, see review:
  https://github.com/llvm/llvm-project/pull/89799