`TypeKind` enum constants are named in wrong code style; correct them before finalization.
Also improved `TypeKind` specification to talk about not mentioned `returnType`, `void`, and subword types being erased to int (and how). See the associated CSR too. ------------- Commit messages: - 8339115: Rename TypeKind enum constants to follow code style Changes: https://git.openjdk.org/jdk/pull/20737/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20737&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8339115 Stats: 664 lines in 31 files changed: 70 ins; 14 del; 580 mod Patch: https://git.openjdk.org/jdk/pull/20737.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/20737/head:pull/20737 PR: https://git.openjdk.org/jdk/pull/20737
