RFR: 8342469: Improve API documentation for java.lang.classfile.instruction [v4]

[Chen Liang]

> Improve the documentation for classfile instructions. Includes links to all opcodes, usage notes for instructions, and other various fixes.
> 
> API Diff: https://cr.openjdk.org/~liach/apidiff/cf-instr/java.base/module-summary.html
> Javadoc: https://cr.openjdk.org/~liach/javadoc/cf-instr/java.base/java/lang/classfile/instruction/package-summary.html
> 
> Please review the associated CSR as well.

Chen Liang has updated the pull request incrementally with four additional commits since the last revision:

 - typo
 - More cleanup
 - Remove a few confusions around bad modeling, some missing exceptions, also the labelless info models
 - Non-int constant values

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/21625/files
  - new: https://git.openjdk.org/jdk/pull/21625/files/4a92d724..2dab7a2f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21625&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21625&range=02-03

  Stats: 1029 lines in 36 files changed: 380 ins; 355 del; 294 mod
  Patch: https://git.openjdk.org/jdk/pull/21625.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21625/head:pull/21625

PR: https://git.openjdk.org/jdk/pull/21625