[code-reflection] RFR: Rename quoteOp and quotedOp

[Mourad Abbay]

Rename quoteOp to embedOp and quotedOp to extractOp.

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Commit messages:
 - Rename quoteOp to embedOp and quotedOp to extractOp

Changes: https://git.openjdk.org/babylon/pull/533/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=533&range=00
  Stats: 24 lines in 6 files changed: 0 ins; 0 del; 24 mod
  Patch: https://git.openjdk.org/babylon/pull/533.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/533/head:pull/533

PR: https://git.openjdk.org/babylon/pull/533