[roll] Roll third_party/acpica Import ACPICA 20230331 sources

Imports a subset of the ACPICA version 20230331 files under the BSD license.

NOTE: a #ifndef guard is added around ACPI_FLEX_ARRAY because the usage
of types containing ACPI_FLEX_ARRAY in fuchsia is incompatible with the
proper definition.

Procedure:
- Determine previous revision: 20221020.
- Calculate diff relative to last import:
  + $ rm -r source
  + $ curl -sfSL https://acpica.org/sites/acpica/files/acpica-unix2-20221020.tar_0.gz | \
      tar -xz \
        --wildcards \
          '*/source/*' \
          '*/changes.txt' \
        --strip-components=1
  + $ git diff -R -- source > fuchsia.patch
- Import new sources:
  + $ rm -r source
  + $ curl -sfSL https://acpica.org/sites/acpica/files/acpica-unix2-20230331.tar.gz | \
      tar -xz \
        --wildcards \
          '*/source/*' \
          '*/changes.txt' \
        --strip-components=1
- $ git add include source changes.txt
- $ git apply --3way --whitespace=fix fuchsia.patch
- Resolve conflicts.
- $ rm fuchsia.patch
- Check for added/deleted files that need to be added to BUILD.gn:
  + git diff --diff-filter=AD --stat

Original-Bug: 80491
Original-Revision: 5ffe545c73fbb2129ae756b6a939f04188347b97
GitOrigin-RevId: 21b944f49abe38b8e4cab06547750f69cc699922
Change-Id: I1b7fc470b2f6c5c14df1b8960bf2f9d1303162f8