RFR: JDK-8311076: RedefineClasses doesn't check for ConstantPool overflow [v2]

[Alex Menkov]

> The fix adds check that merged constant pool does not overflow u2 (two-byte unsigned).
> The check is added after merging `the_class` and `scratch_class` constant pools, but before rewriting constant pool references.
> 
> testing:
>  - sanity tier1;
>  - all RedefineClasses/RetransformClasses tests:
>    - test/jdk/java/lang/instrument
>    - test/hotspot/jtreg/serviceability/jvmti/RedefineClasses
>    - test/hotspot/jtreg/vmTestbase/nsk/jvmti/RedefineClasses
>    - test/hotspot/jtreg/vmTestbase/nsk/jvmti/RetransformClasses

Alex Menkov has updated the pull request incrementally with one additional commit since the last revision:

  logging on cp overflow

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17759/files
  - new: https://git.openjdk.org/jdk/pull/17759/files/31b31fe8..a726ea8b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17759&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17759&range=00-01

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/17759.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17759/head:pull/17759

PR: https://git.openjdk.org/jdk/pull/17759