[code-reflection] RFR: Implementation of -XDreflectAll switch

[Adam Sotona]

This is a proposal for a `reflectAll` javac switch that provides code reflection models for all eligible methods and lambdas when enabled.

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Commit messages:
 - implementation of -XDreflectAll switch

Changes: https://git.openjdk.org/babylon/pull/822/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=822&range=00
  Stats: 5 lines in 1 file changed: 2 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/babylon/pull/822.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/822/head:pull/822

PR: https://git.openjdk.org/babylon/pull/822