[code-reflection] Integrated: Sealed the HATOp/dialect hierarchy

[Gary Frost]

Closed/Sealed the HATOp dialect heirarchy.  

Moved common code down to base class (we had a lot of duplicated code and shadowed fields) 

PTXPtr could not be kept as a HATOp (cross module) so it now just extends Op.

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Commit messages:
 - Sealed the HATOp/dialect hierarchy

Changes: https://git.openjdk.org/babylon/pull/778/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=778&range=00
  Stats: 384 lines in 55 files changed: 131 ins; 104 del; 149 mod
  Patch: https://git.openjdk.org/babylon/pull/778.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/778/head:pull/778

PR: https://git.openjdk.org/babylon/pull/778