[jdk21u-dev] RFR: 8334756: javac crashed on call to non-existent generic method with explicit annotated type arg

[Satyen Subramaniam]

Backporting JDK-8334756: javac crashed on call to non-existent generic method with explicit annotated type arg. Adjusts code to avoid a ClassCastException in javac while compiling a non-existent method annotated with type annotations. Rather than encouraging users to file a JBS issue, directly identify the problematic annotations. Ran GHA Sanity Checks, local Tier 1 and 2, and new test directly. Patch is clean.

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Commit messages:
 - Backport abcd23f4d65698f47fd79a95aed197a12edf2784

Changes: https://git.openjdk.org/jdk21u-dev/pull/1859/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1859&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334756
  Stats: 29 lines in 3 files changed: 28 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1859.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1859/head:pull/1859

PR: https://git.openjdk.org/jdk21u-dev/pull/1859