[jdk21] RFR: 8312814: Compiler crash when template processor type is a captured wildcard

[Jim Laskey]

8312814: Compiler crash when template processor type is a captured wildcard

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Commit messages:
 - Backport f14245b3880ff735ae231b4c7d2c6b6907c5f7d4

Changes: https://git.openjdk.org/jdk21/pull/167/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21&pr=167&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8312814
  Stats: 40 lines in 2 files changed: 40 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21/pull/167.diff
  Fetch: git fetch https://git.openjdk.org/jdk21.git pull/167/head:pull/167

PR: https://git.openjdk.org/jdk21/pull/167