[code-reflection] RFR: Unreflect tests [v2]

[Adam Sotona]

> This PR implement `Unreflect` test tool and re-runs tests in the unreflected form.
> 
> `TestSwitchExpressionOp` and `TestSwitchStatementOp` yet to be temporary excluded as failing.

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

  simplification

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

Changes:
  - all: https://git.openjdk.org/babylon/pull/762/files
  - new: https://git.openjdk.org/babylon/pull/762/files/c3118ba2..c17e1825

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=762&range=01
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=762&range=00-01

  Stats: 57 lines in 1 file changed: 0 ins; 34 del; 23 mod
  Patch: https://git.openjdk.org/babylon/pull/762.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/762/head:pull/762

PR: https://git.openjdk.org/babylon/pull/762