[code-reflection] RFR: Unify common code of SwitchStatementOp and SwitchExpressionOp [v2]

[Mourad Abbay]

> Unify common code of SwitchStatementOp and SwitchExpressionOp.

Mourad Abbay has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'code-reflection' into unify-sw-op
 - Refactor

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Changes:
  - all: https://git.openjdk.org/babylon/pull/222/files
  - new: https://git.openjdk.org/babylon/pull/222/files/16816326..6d49a8dc

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=222&range=01
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=222&range=00-01

  Stats: 837 lines in 22 files changed: 558 ins; 97 del; 182 mod
  Patch: https://git.openjdk.org/babylon/pull/222.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/222/head:pull/222

PR: https://git.openjdk.org/babylon/pull/222