RFR: 8331744: java.lang.classfile.TypeKind improvements

[Chen Liang]

A peek into TypeKind during the research for #19105 reveals that TypeKind has a few issues:
1. Name mismatch for `newarraycode` and `fromNewArrayCode`: Renamed both to use "newarray code"
2. `fromDescriptor` can throw IOOBE if the input string is empty: changed to throw IAE and added tests.
3. `from(Class)` can be slow due to descriptor computation: added benchmark, will share result in next comment (as it may change with code changes).

The first 2 changes involves API changes, and a CSR has been created. Requesting @asotona for a review.

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Commit messages:
 - whitespace
 - 8331744: java.lang.classfile.TypeKind improvements

Changes: https://git.openjdk.org/jdk/pull/19109/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19109&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8331744
  Stats: 170 lines in 5 files changed: 154 ins; 0 del; 16 mod
  Patch: https://git.openjdk.org/jdk/pull/19109.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19109/head:pull/19109

PR: https://git.openjdk.org/jdk/pull/19109