Improve fuzz test for VectorImage


This speeds up the fuzz test significantly by using the private
setSourceData() API rather than loading the mutated data through
a file.

Task-number: QTBUG-148828
Pick-to: 6.12
Change-Id: I415a803ea92cb691045601d538182e89f455eddc
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
commitacc60e6f71e9c56bab3fccbccb601dd68f2823e3
parentffde6879e190142926d227f408e966290a8819b4
authorEskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
committerEskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
commit timeThu, 24 Sep 2026 08:25:36 +0000