[code-reflection] RFR: Experiment with replacing textual representation in classfile with method that builds the model [v2]

[Mourad Abbay]

> Experiment with replacing textual representation in classfile with method that builds the model.
> Note: This PR is based on changes from #272.

Mourad Abbay has updated the pull request incrementally with two additional commits since the last revision:

 - Assert on the value of executing builder method
 - Change bytecode generation for NewOp to use constructor type as owner

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Changes:
  - all: https://git.openjdk.org/babylon/pull/274/files
  - new: https://git.openjdk.org/babylon/pull/274/files/d9e5e196..176108a8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=274&range=01
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=274&range=00-01

  Stats: 51 lines in 2 files changed: 32 ins; 2 del; 17 mod
  Patch: https://git.openjdk.org/babylon/pull/274.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/274/head:pull/274

PR: https://git.openjdk.org/babylon/pull/274