RFR: 8347147: [REDO] AccessFlags can be u2 in metadata [v2]

[Coleen Phillimore]

> This is the same change that I pushed as commit 098afc8b7d0e7caa82999fb9d4e319ea8aed09a1 but now coordinated with @mur47x111  for the graal changes.
> 
> A tier1 sanity test complete.

Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:

  Fix some more triggerUnloading() in tests.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22968/files
  - new: https://git.openjdk.org/jdk/pull/22968/files/71419187..9b2abf9c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22968&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22968&range=00-01

  Stats: 13 lines in 3 files changed: 5 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/22968.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22968/head:pull/22968

PR: https://git.openjdk.org/jdk/pull/22968