RFR: 8305668: PPC: Non-Top Interpreted frames should be independent of ABI_ELFv2 [v4]

[Richard Reingruber]

> This PR makes parent interpreted Java frames independent of `ABI_ELFv2`.
> With the changes `test/jdk/jdk/internal/vm/Continuation/BasicExt.java#COMP_ALL` succeeds on PPC64 Big Endian Linux.
> 
> Before:
> 
> * `parent_ijava_frame_abi` was derived from `abi_minframe` which depends on `ABI_ELFv2`
> * jit_abi is independent of `abi_minframe`
> * `frame::metadata_words` is wrong for `parent_ijava_frame_abi` if `ABI_ELFv2` is not defined (big endian)
> 
> After changes:
> 
> * prefixed structs that depend on `ABI_ELFv2` with `native_`
> * introduced `java_abi` which is independent of `ABI_ELFv2`
> * `frame::metadata_words` is the size in words of `java_abi`
> 
> This is still a little imprecise since `top_ijava_frame_abi` is larger than `java_abi` but the top frame is never frozen as it is always `vmIntrinsics::_Continuation_doYield`
> 
> Testing:
> 
> PPC64le: most JCK and JTREG tiers 1-4, also in Xcomp mode.
> PPC64be Linux: hotspot tier1 tests

Richard Reingruber has updated the pull request incrementally with one additional commit since the last revision:

  Copyright years

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Changes:
  - all: https://git.openjdk.org/jdk/pull/13372/files
  - new: https://git.openjdk.org/jdk/pull/13372/files/1e7ba3f6..207b500f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13372&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13372&range=02-03

  Stats: 15 lines in 14 files changed: 0 ins; 0 del; 15 mod
  Patch: https://git.openjdk.org/jdk/pull/13372.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13372/head:pull/13372

PR: https://git.openjdk.org/jdk/pull/13372