[code-reflection] RFR: CoreOps to CoreOp, ExtendedOps to ExtendedOp [v2]

[Paul Sandoz]

> Rename `CoreOps` to `CoreOp` and become the top-top for all core operations. Same for `ExtendedOps`.

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

  Remove errant insert when refactoring

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Changes:
  - all: https://git.openjdk.org/babylon/pull/73/files
  - new: https://git.openjdk.org/babylon/pull/73/files/58bb8c97..8de37bb6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=73&range=01
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=73&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/babylon/pull/73.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/73/head:pull/73

PR: https://git.openjdk.org/babylon/pull/73