Fix go/lem breakages on baseline configs

- Don't collect profiling info for now, as compiled code reference
  them directly.
- Only compile optimized after reaching baseline hotness threshold if
  tiered JIT is enabled.

Test: test.py, go/lem benchmarks.
Change-Id: I0d21d5f77825a710588ef5a7c11288a5b9757907
4 files changed