RFR: 8339466: Enumerate shared stubs and define static fields and names via declarations [v4]

[Andrew Dinn]

> Systematize handling of SharedRuntime stubs. Generate enum ids, static fields and names from declarations using template macros. Systematically reference stubs and stub names using ids.

Andrew Dinn has updated the pull request incrementally with one additional commit since the last revision:

  clean up asserts

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Changes:
  - all: https://git.openjdk.org/jdk/pull/20832/files
  - new: https://git.openjdk.org/jdk/pull/20832/files/681f8cb7..8d477b10

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20832&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20832&range=02-03

  Stats: 63 lines in 7 files changed: 0 ins; 42 del; 21 mod
  Patch: https://git.openjdk.org/jdk/pull/20832.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20832/head:pull/20832

PR: https://git.openjdk.org/jdk/pull/20832