Deduplicate byte swapping implementations by consolidating them into `utilities/byteswap.hpp`, following `std::byteswap` introduced in C++23. Further simplification of `Bytes` will follow in https://github.com/openjdk/jdk/pull/12078.

Justin King 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 16 additional commits since the last revision: - Merge remote-tracking branch 'upstream/master' into byteswap - Be restrict on requiring 1, 2, 4, or 8 byte integers Signed-off-by: Justin King <jcking@google.com> - Consolidate more byteswap implementations and upgrade bit reversal Signed-off-by: Justin King <jcking@google.com> - Update comment Signed-off-by: Justin King <jcking@google.com> - Add missing static_cast to XL C/C++ implementation Signed-off-by: Justin King <jcking@google.com> - Cleanup Bytes::swap_uN Signed-off-by: Justin King <jcking@google.com> - Add XL C/C++ builtins Signed-off-by: Justin King <jcking@google.com> - Fix mistake in MSVC implementation Signed-off-by: Justin King <jcking@google.com> - Update comment to reflect previous commit change Signed-off-by: Justin King <jcking@google.com> - Use __bulitin_bswap for GCC in debug builds Signed-off-by: Justin King <jcking@google.com> - ... and 6 more: https://git.openjdk.org/jdk/compare/051995b8...3b9decfa ------------- Changes: - all: https://git.openjdk.org/jdk/pull/12114/files - new: https://git.openjdk.org/jdk/pull/12114/files/56e5c235..3b9decfa Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=12114&range=09 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12114&range=08-09 Stats: 22873 lines in 944 files changed: 9818 ins; 3924 del; 9131 mod Patch: https://git.openjdk.org/jdk/pull/12114.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12114/head:pull/12114 PR: https://git.openjdk.org/jdk/pull/12114