RFR: 8347148: [BACKOUT] AccessFlags can be u2 in metadata

[David Holmes]

Revert "8339113: AccessFlags can be u2 in metadata"

This reverts commit 098afc8b7d0e7caa82999fb9d4e319ea8aed09a1.

The integration of the original change needs to be coordinated with a change to Graal so backing out till that is ready.

Thanks

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Commit messages:
 - Revert "8339113: AccessFlags can be u2 in metadata"

Changes: https://git.openjdk.org/jdk/pull/22959/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22959&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8347148
  Stats: 328 lines in 58 files changed: 50 ins; 45 del; 233 mod
  Patch: https://git.openjdk.org/jdk/pull/22959.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22959/head:pull/22959

PR: https://git.openjdk.org/jdk/pull/22959