[code-reflection] RFR: Remove bytecode dialect [v12]

[Adam Sotona]

> This patch re-implements `BytecodeLift` to lift from bytecode directly to the core dialect
> and removes `BytecodeInstructionOps` with the bytecode dialect.
> 
> Implementation is complete up to the point of passing all current tests.
> 
> Please review.
> 
> Thanks,
> Adam

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

  Implemented skipping of unitialized blocks and dead code detection
  + added tests for back jumps and dead code

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

Changes:
  - all: https://git.openjdk.org/babylon/pull/16/files
  - new: https://git.openjdk.org/babylon/pull/16/files/22710f57..c4d0018a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=16&range=11
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=16&range=10-11

  Stats: 469 lines in 2 files changed: 192 ins; 134 del; 143 mod
  Patch: https://git.openjdk.org/babylon/pull/16.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/16/head:pull/16

PR: https://git.openjdk.org/babylon/pull/16