Update bundled libwebp to version 1.3.2
requested to merge asturmlechner/qtimageformats:asturmlechner/QTBUG-117071-libwebp-1.3.2 into kde/5.15
[ChangeLog][Third-Party Code] Update bundled libwebp to version 1.3.2
Pick-to: 6.6 6.6.0 6.5 6.5.3 6.2 5.15 Fixes: QTBUG-117071 Change-Id: Ida0ab9b4791a8203e6748960aeb96fb9ade6a383 Reviewed-by: Mårten Nordheim marten.nordheim@qt.io (cherry picked from commit 4cfdd47d)
- asturmlechner 2023-09-16: by means of conflict resolution, also carries