[code-reflection] Integrated: Codebuilders are useful in some common optkl tooling

[Gary Frost]

Some of the optkl tooling benefits from HAT style code builders.  So we moved these down.

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Commit messages:
 - Codebuilders are useful in some common optkl tooling

Changes: https://git.openjdk.org/babylon/pull/761/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=761&range=00
  Stats: 2220 lines in 40 files changed: 1090 ins; 1088 del; 42 mod
  Patch: https://git.openjdk.org/babylon/pull/761.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/761/head:pull/761

PR: https://git.openjdk.org/babylon/pull/761