[jdk20u] RFR: 8296389: C2: PhaseCFG::convert_NeverBranch_to_Goto must handle both orders of successors

[Tobias Hartmann]

Backport of [JDK-8296389](https://bugs.openjdk.java.net/browse/JDK-8296389). Applies cleanly. Approval is pending.

Thanks,
Tobias

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Commit messages:
 - 8296389: C2: PhaseCFG::convert_NeverBranch_to_Goto must handle both orders of successors

Changes: https://git.openjdk.org/jdk20u/pull/26/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk20u&pr=26&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8296389
  Stats: 188 lines in 11 files changed: 167 ins; 2 del; 19 mod
  Patch: https://git.openjdk.org/jdk20u/pull/26.diff
  Fetch: git fetch https://git.openjdk.org/jdk20u.git pull/26/head:pull/26

PR: https://git.openjdk.org/jdk20u/pull/26