Fix flaky tests
These tests fail sometimes and block merging MRs
FAIL! : TestXdgShellWindow::testWindowOutputs() Compared values are not the same
Actual (surface->outputs().count()): 0
Expected (1) : 1
Loc: [/builds/plasma/kwin/autotests/integration/xdgshellwindow_test.cpp(313)]
FAIL! : InputMethodTest::testEnableActive() 'windowAddedSpy.wait()' returned FALSE. ()
Loc: [/builds/plasma/kwin/autotests/integration/inputmethod_test.cpp(228)]