Update runtime to 49 and more

[yakushabb]

• Update runtime to 49
• Drop ineffective cleanup commands
• Fix appdata paper cuts

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[yakushabb]

Error: Appstream: 'E:io.github.cboxdoerfer.FSearch.metainfo.xml:tag-duplicated:39 
This tag must only appear once in this context. Having multiple tags of this kind is not valid.'

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🚧 Test build enqueued.

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🚧 Started test build.

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✅ Test build succeeded. To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/265157/io.github.cboxdoerfer.FSearch.flatpakref

Built for aarch64 and x86_64 architectures.