TEST-08: don't force ext4 for /

Forcing a specific fs for the image is usually a bad idea because the initrd
(borrowed from the host) is likely to include only support for the filesystem
used by the host's rootfs.

Since the point of this test is to check aliases on mount units, there's no
specific need for ext4, hence drop any parts that request or rely on ext4.

test/TEST-08-ISSUE-2730/test.sh

@@ -10,7 +10,6 @@ TEST_NO_NSPAWN=1
 . "${TEST_BASE_DIR:?}/test-functions"
 
 QEMU_TIMEOUT=300
-FSTYPE=ext4
 TEST_FORCE_NEWIMAGE=1
 
 do_test "$@"

test/testsuite-08.units/-.mount

@@ -5,8 +5,7 @@ Before=local-fs.target
 [Mount]
 What=/dev/sda1
 Where=/
-Type=ext4
-Options=errors=remount-ro,noatime
+Options=noatime
 
 [Install]
 WantedBy=local-fs.target