[code-reflection] Integrated: Switched to using schema dsl rather than annotions for field order

[Gary Frost]

Rather than using annotations for field order for simple iterface mapped buffers we reflect on a schema method. 

See S32Array and F32Array

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

Commit messages:
 - Switched to using schema dsl rather than annotions for field order

Changes: https://git.openjdk.org/babylon/pull/790/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=790&range=00
  Stats: 295 lines in 9 files changed: 56 ins; 190 del; 49 mod
  Patch: https://git.openjdk.org/babylon/pull/790.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/790/head:pull/790

PR: https://git.openjdk.org/babylon/pull/790