[code-reflection] RFR: Exception regions fix [v7]

[Adam Sotona]

> BytecodeGenerator::computeExceptionRegionMembership now collects all necessary info into BitSets and directly declares the regions with CodeBuilder.
> All tests are now passing.
> 
> Please review.
> 
> Thanks,
> Adam

Adam Sotona has updated the pull request incrementally with one additional commit since the last revision:

  Apply suggestions from code review
  
  Co-authored-by: Paul Sandoz <paul.d.sandoz at googlemail.com>

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Changes:
  - all: https://git.openjdk.org/babylon/pull/12/files
  - new: https://git.openjdk.org/babylon/pull/12/files/8a521693..f40a53a1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=12&range=06
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=12&range=05-06

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/babylon/pull/12.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/12/head:pull/12

PR: https://git.openjdk.org/babylon/pull/12