RFR: 8306440: Rename PSS:_num_optional_regions to _num_initial_optional_regions [v2]

[Thomas Schatzl]

> Hi all,
> 
>    please review this small change that clarifies the use of `PSS::_num_optional_regions` to be the initial amount of optional regions, not the current amount of optional regions.
> 
> Testing: gha
> 
> Thanks,
>   Thomas

Thomas Schatzl has updated the pull request incrementally with 36 additional commits since the last revision:

 - ayang review
 - Merge branch 'master' into 8306440-rename-num_optional_regions
 - 8306581: JVMCI tests failed when run with -XX:TypeProfileLevel=222 after JDK-8303431
   
   Reviewed-by: never, kvn
 - 8306430: Open source some AWT tests related to TextComponent and Toolkit
   
   Reviewed-by: serb
 - 8305942: Open source several AWT Focus related tests
   
   Reviewed-by: prr
 - 8306060: Open source few AWT Insets related tests
   
   Reviewed-by: serb, prr
 - 8305236: Some LoadLoad barriers in the interpreter are unnecessary after JDK-8220051
   
   Reviewed-by: dholmes, fyang, aph
 - 8305207: Calendar.aggregateStamp(int, int) return value can be simplified
   
   Reviewed-by: naoto, rriggs, iris
 - 4737887: (cal) API: Calendar methods taking field should document exceptions
   
   Reviewed-by: naoto
 - 8306474: Move InstanceKlass read-only flags
   
   Reviewed-by: jrose, dholmes
 - ... and 26 more: https://git.openjdk.org/jdk/compare/aa346ef9...a427591c

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/13532/files
  - new: https://git.openjdk.org/jdk/pull/13532/files/aa346ef9..a427591c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13532&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13532&range=00-01

  Stats: 7991 lines in 137 files changed: 7501 ins; 294 del; 196 mod
  Patch: https://git.openjdk.org/jdk/pull/13532.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13532/head:pull/13532

PR: https://git.openjdk.org/jdk/pull/13532