RFR: 8339320: Optimize ClassFile Utf8EntryImpl#inflate [v4]

[Shaojin Wen]

> A very small optimization, split the large method inflate, split the infrequently used paths into a method inflateCHAR

Shaojin Wen has updated the pull request incrementally with one additional commit since the last revision:

  Update src/java.base/share/classes/jdk/internal/classfile/impl/AbstractPoolEntry.java
  
  Co-authored-by: Chen Liang <liach at openjdk.org>

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Changes:
  - all: https://git.openjdk.org/jdk/pull/20767/files
  - new: https://git.openjdk.org/jdk/pull/20767/files/8b3c67da..f8cdfa77

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20767&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20767&range=02-03

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/20767.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20767/head:pull/20767

PR: https://git.openjdk.org/jdk/pull/20767