Use a cached temporary track when looking up cover arts form file met… #3732

Job	Run time
Ubuntu 22.04 (gcc)	10m 18s
Ubuntu 22.04 (Qt 6.2, gcc)	12m 39s
macOS 12 x64	10m 37s
macOS 12 arm64	10m 30s
Windows 2019 (MSVC)	15m 30s
Update manifest file on download server	32s
	1h 0m 6s

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