RFR: 8371187: [BigEndian Platforms] Vector lane reversal error [v2]

[Varada M]

> This change fixes incorrect lane ordering in reinterpretation operations on big-endian platforms. When converting from wider to narrower lane types like Long to Int, Long to Short, big-endian systems produced reversed sub-lanes.
> The patch adds a maybeSwapOnConverted() and a generic normalizeSubLanesForSpecies() shuffle builder to correct the sub-lane order based on element sizes on big-endian
> 
> JBS: [JDK-8371187](https://bugs.openjdk.org/browse/JDK-8371187)

Varada M has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - 8371187: [BigEndian Platforms] Vector lane reversal error
 - Merge remote-tracking branch 'origin/vecalign' into vecalign
 - fix for vector alignment issue on big-endian

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Changes:
  - all: https://git.openjdk.org/jdk/pull/28425/files
  - new: https://git.openjdk.org/jdk/pull/28425/files/05d4b806..7c87d2bc

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28425&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28425&range=00-01

  Stats: 489139 lines in 7084 files changed: 306787 ins; 107695 del; 74657 mod
  Patch: https://git.openjdk.org/jdk/pull/28425.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28425/head:pull/28425

PR: https://git.openjdk.org/jdk/pull/28425