meson.build: drop the timeouts to fit into the CI's 60 min limit

The vm tests had a 20 min timeout and a multiplier of 100. Our CI will
kill us (without logs) after 60 minutes.

Let's drop this to ~18min and a multiplier of 3 which gives us a few
minutes for setup before the CI terminates us. Ideally this means
we get some meson logs on timeout failures.

Part-of: <https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/1274>

meson.build

@@ -1044,7 +1044,7 @@ if get_option('tests')
 		     suite : ['all', 'valgrind', 'root', 'hardware'],
 		     args : ['--filter-group=@0@'.format(group)],
 		     is_parallel : false,
-		     timeout : 1200)
+		     timeout : 1100)
         endforeach
 
 	test('libinput-test-deviceless',
@@ -1064,7 +1064,7 @@ if get_option('tests')
 						'--error-exitcode=3',
 						'--suppressions=' + valgrind_suppressions_file ],
 				env :  valgrind_env,
-				timeout_multiplier : 100)
+				timeout_multiplier : 3)
 	else
 		message('valgrind not found, disabling valgrind test suite')
 	endif