collections: Add luci-app-attendedsysupgrade as default

collections: Add luci-app-attendedsysupgrade as default

Add the luci-app-attendedsysupgrade package as default package when
luci-app-package-manager is already added.

This should spread the usage of ASU more in the next release.

This adds the following 3 packages to the default LuCi image:
5131 bin/packages/aarch64_cortex-a53/base/rpcd-mod-rpcsys-2025.11.07~91700007-r1.apk
8781 bin/packages/aarch64_cortex-a53/luci/luci-app-attendedsysupgrade-25.302.55139~cf868f4.apk
1322 bin/packages/aarch64_cortex-a53/packages/attendedsysupgrade-common-9.apk

Signed-off-by: Hauke Mehrtens <redacted>