RFR: 8364187: Make getClassAccessFlagsRaw non-native [v5]

[Coleen Phillimore]

> This change removes the intrinsic for getClassAccessFlagsRaw for reflection and initializes an rawAccessFlags field in java.lang.Class instead, that Java code can non-natively access.
> Tested with tier1-4.

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

  Restore c2 optimization.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/26517/files
  - new: https://git.openjdk.org/jdk/pull/26517/files/45b92c5c..fb6c15e8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26517&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26517&range=03-04

  Stats: 5 lines in 1 file changed: 5 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/26517.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26517/head:pull/26517

PR: https://git.openjdk.org/jdk/pull/26517