gnu: rosegarden: Update to 25.06.

* gnu/packages/music.scm (rosegarden): Update to 25.06.
[arguments]<#:qtbase>: Set to qtbase.
<#:configure-flags>: Remove "-DCMAKE_BUILD_TYPE=release"; add "DUSE_QT6=ON".
<#:test-exclude>: Exclude "test_notationview_selection".
<#:phases>: Remove 'patch-tests phase. In 'make-reproducible phase, remove
comments related to qt5. In 'prepare-check phase, do not set "QT_QPA_PLATFORM"
since qt-build-system sets it. In 'check phase, replace the test to exclude
with test-exclude keyword.
[inputs]: Remove qtbase-5; replace qtwayland-5 with qtwayland; add qt5compat,
lilv and lv2.
[native-inputs]: Replace qttools-5 with qttools.

Change-Id: I31f4d7be7a4e95b2d82150365d09f1b6a02a6edb