[code-reflection] RFR: ExplicitOnnxOps.If implementation of captured values and initializers [v3]

[Adam Sotona]

> ExplicitOnnxOps.If implementation of captured values and initializers - another attempt to do it right

Adam Sotona has updated the pull request incrementally with one additional commit since the last revision:

  added raw support for variadic (list) results + SimpleTest::testSplit

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Changes:
  - all: https://git.openjdk.org/babylon/pull/359/files
  - new: https://git.openjdk.org/babylon/pull/359/files/69f9d1ab..09e4a482

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=359&range=02
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=359&range=01-02

  Stats: 59 lines in 5 files changed: 54 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/babylon/pull/359.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/359/head:pull/359

PR: https://git.openjdk.org/babylon/pull/359