[code-reflection] RFR: Make Quoted generic [v2]

[Paul Sandoz]

> Make `Quoted` generic with an upper bound of `Op`. Modify `Op.ofLambda` to return `Quoted<JavaOp.LambdaOp>`.

Paul Sandoz has updated the pull request incrementally with one additional commit since the last revision:

  Cleaning up remaining references to quotable.

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Changes:
  - all: https://git.openjdk.org/babylon/pull/845/files
  - new: https://git.openjdk.org/babylon/pull/845/files/121c418a..58cd0e74

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=845&range=01
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=845&range=00-01

  Stats: 44 lines in 5 files changed: 2 ins; 9 del; 33 mod
  Patch: https://git.openjdk.org/babylon/pull/845.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/845/head:pull/845

PR: https://git.openjdk.org/babylon/pull/845