RFR: 8371187: [BigEndian Platforms] Vector lane reversal error [v4]

[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 incrementally with one additional commit since the last revision:

  8371187: [BigEndian Platforms] Vector lane reversal error

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Changes:
  - all: https://git.openjdk.org/jdk/pull/28425/files
  - new: https://git.openjdk.org/jdk/pull/28425/files/670043ae..e26a5c89

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28425&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28425&range=02-03

  Stats: 26 lines in 7 files changed: 11 ins; 0 del; 15 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