[jdk21u] RFR: 8310106: sun.security.ssl.SSLHandshake.getHandshakeProducer() incorrectly checks handshakeConsumers

[Aleksey Shipilev]

Clean backport to fix minor TLS 3.0 bug.

Additional testing:
 - [x] macosx-aarch64-server-fastdebug, `jdk_security` passes

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Commit messages:
 - Backport db133dbc02a7f38104fdbca967c59f758c6f4336

Changes: https://git.openjdk.org/jdk21u/pull/55/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=55&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310106
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk21u/pull/55.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/55/head:pull/55

PR: https://git.openjdk.org/jdk21u/pull/55