RFR: 8304693: Remove -XX:-UseVtableBasedCHA

[Vladimir Ivanov]

JDK-8266074 introduced new CHA implementation and a flag (-XX:-UseVtableBasedCHA) to switch back to the original implementation for diagnostic purposes. Vtable-based CHA implementation has been turned on by default since 17 and now the time has come to remove UseVtableBasedCHA flag.

Testing: hs-tier1 - hs-tier6

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Commit messages:
 - Remove -XX:-UseVtableBasedCHA

Changes: https://git.openjdk.org/jdk/pull/19911/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19911&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8304693
  Stats: 166 lines in 11 files changed: 1 ins; 154 del; 11 mod
  Patch: https://git.openjdk.org/jdk/pull/19911.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19911/head:pull/19911

PR: https://git.openjdk.org/jdk/pull/19911