[jdk21u] RFR: 8314226: Series of colon-style fallthrough switch cases with guards compiled incorrectly

[Aggelos Biboudis]

8314226: Series of colon-style fallthrough switch cases with guards compiled incorrectly

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Commit messages:
 - Backport 3b0a6d2a6842962218b8cebcd9c0672cb4ee6720

Changes: https://git.openjdk.org/jdk21u/pull/161/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=161&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314226
  Stats: 218 lines in 2 files changed: 217 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u/pull/161.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/161/head:pull/161

PR: https://git.openjdk.org/jdk21u/pull/161