RFR: 8320403: C2: PrintIdeal is no longer dumped to tty when xtty is set

[Christian Hagedorn]

During debugging, it was noticed that the output of `PrintIdeal` is not printed to tty anymore when `LogCompilation` is enabled (i.e. xtty is set). This was accidentally changed by [JDK-8306922](https://bugs.openjdk.org/browse/JDK-8306922). This fix reverts this part of the change to dump to tty instead of xtty which also gets dumped to the log file.

Thanks,
Christian

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Commit messages:
 - 8320403: C2: PrintIdeal is no longer dumped to tty when xtty is set

Changes: https://git.openjdk.org/jdk/pull/16778/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16778&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8320403
  Stats: 7 lines in 1 file changed: 4 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/16778.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16778/head:pull/16778

PR: https://git.openjdk.org/jdk/pull/16778