CLSA-2026-1778107793 qt5-qtbase: Fix of 3 CVEs

CVE-2025-5455: fix qDecodeDataUrl crash on malformed data URL with charset - CVE-2024-25580: fix KTX file reading buffer overflow - CVE-2024-39936: delay HTTP/2 communication until encrypted can be responded to includes prerequisite to emit encrypted on H2 path...