RFR: 8343932: Error when parsing qualified generic type test pattern in switch

[Aggelos Biboudis]

Addressing issue in the`analyzePattern` with qualified type patterns (presence of `DOT`).

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Commit messages:
 - 8343932: Error when parsing qualified generic type test pattern in switch

Changes: https://git.openjdk.org/jdk/pull/22487/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22487&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8343932
  Stats: 58 lines in 2 files changed: 57 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22487.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22487/head:pull/22487

PR: https://git.openjdk.org/jdk/pull/22487