Support unspecified linear size in DDS files #18029

Job	Run time
📊 Static checks / Code style, file formatting, and docs	46s
🤖 Android / Template (target=template_release)	9m 30s
🐧 Linux / Editor w/ Mono (target=editor)	15m 45s
🐧 Linux / Editor with doubles and GCC sanitizers (target=editor, tests=yes, dev_build=yes, scu_build=yes, precision=double, use_asan=yes, use_ubsan=yes, linker=gold)	22m 58s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	14m 36s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	14m 2s
🍏 iOS / Template (target=template_release)	13m 52s
🐧 Linux / Template w/ Mono (target=template_release)	6m 46s
🍎 macOS / Editor (target=editor, tests=yes)	14m 23s
🌐 Web / Template (target=template_release)	5m 34s
🍎 macOS / Template (target=template_release)	6m 19s
🐧 Linux / Minimal template (target=template_release, everything disabled)	5m 45s
🏁 Windows / Editor (target=editor, tests=yes)	19m 36s
🏁 Windows / Template (target=template_release)	10m 48s
🪲 Godot CPP / Build and test Godot CPP	6m 49s
	2h 47m 29s

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