[code-reflection] RFR: Add buffer tagging and opt-out moduleOp backend [v2]

[Ruby Chen]

> Add a tool to tag kernel buffers with RO, WO, RW, or NA. 
> 
> Currently, the result of the buffer tagger is only used to assert that it matches with the respective buffer annotations in the HAT kernels. 
> 
> Also make moduleOp an opt-out backend for HAT, which can be disabled by passing the flag `noModuleOp` when running HAT. For example, running the mandel example with the ffi-opencl backend and moduleOp disabled can be done with
> 
> java @hat/run noModuleOp ffi-opencl mandel

Ruby Chen has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains five commits:

 - Merge branch 'code-reflection' into buffer-tagging
 - Clean up BufferTagger
 - Merge branch 'openjdk:code-reflection' into buffer-tagging
 - Merge branch 'openjdk:code-reflection' into buffer-tagging
 - Add buffer tagging and opt-out moduleOp backend

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Changes: https://git.openjdk.org/babylon/pull/548/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=548&range=01
  Stats: 277 lines in 10 files changed: 243 ins; 20 del; 14 mod
  Patch: https://git.openjdk.org/babylon/pull/548.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/548/head:pull/548

PR: https://git.openjdk.org/babylon/pull/548