cephfs: disable failing fallocate tests for more branches

In pr#1045 we disabled the test for main. It seems that the change
has now been backported to many other branches as the test began
failing on all pre-{quincy,reef,squid} cli jobs too.
Disable the test for pretty much all the active ceph branches.

Signed-off-by: John Mulligan <jmulligan@redhat.com>

cephfs/file_test.go

@@ -512,7 +512,8 @@ func TestFallocate(t *testing.T) {
 
 	// Allocate space - default case, mode == 0.
 	t.Run("modeIsZero", func(t *testing.T) {
-		if serverVersion == cephMain {
+		switch serverVersion {
+		case cephMain, cephSquid, cephReef, cephQuincy:
 			t.Skip("fallocate with mode 0 is unsupported: https://tracker.ceph.com/issues/68026")
 		}
 
@@ -531,7 +532,8 @@ func TestFallocate(t *testing.T) {
 
 	// Allocate space - size increases, data remains intact.
 	t.Run("increaseSize", func(t *testing.T) {
-		if serverVersion == cephMain {
+		switch serverVersion {
+		case cephMain, cephSquid, cephReef, cephQuincy:
 			t.Skip("fallocate with mode 0 is unsupported: https://tracker.ceph.com/issues/68026")
 		}