[lworld] Integrated: 8309353: [lworld] C2 compilations fails with assert(false) failed: type flow analysis failed for OSR compilation

[Tobias Hartmann]

With [JDK-8301007](https://bugs.openjdk.org/browse/JDK-8301007) we added a trap at calls to methods with unloaded return type in C2 until [JDK-8284443](https://bugs.openjdk.org/browse/JDK-8284443) is fixed. This can lead to a rare and harmless compilation bailout   for OSR compilations which triggers an assert now that we merged in [JDK-8303951](https://bugs.openjdk.org/browse/JDK-8303951) from mainline. Let's simply disable that assert again until [JDK-8284443](https://bugs.openjdk.org/browse/JDK-8284443) is fixed.

Thanks,
Tobias

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Commit messages:
 - 8309353: [lworld] C2 compilations fails with assert(false) failed: type flow analysis failed for OSR compilation

Changes: https://git.openjdk.org/valhalla/pull/857/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=857&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8309353
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/857.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/857/head:pull/857

PR: https://git.openjdk.org/valhalla/pull/857