[code-reflection] RFR: ONNX FFM Runtime initial work [v5]

[Adam Sotona]

> This is initial work on ONNX FFM runtime with very raw connection with OnnxInterpreter and Tensor.
> 
> It is a rebase of https://github.com/PaulSandoz/babylon/pull/1

Adam Sotona has updated the pull request incrementally with two additional commits since the last revision:

 - runtime getting tensor element type from the first input value
   
 - interpreter returns array of tensors for multiple outputs

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Changes:
  - all: https://git.openjdk.org/babylon/pull/311/files
  - new: https://git.openjdk.org/babylon/pull/311/files/ed4b8178..f4d30408

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=311&range=04
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=311&range=03-04

  Stats: 11 lines in 2 files changed: 6 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/babylon/pull/311.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/311/head:pull/311

PR: https://git.openjdk.org/babylon/pull/311