crtc: Move all_transforms field into instance private

Now set as a property during construction. Only actually set by the
Xrandr backend, as it's the only one currently not supporting all
transforms, which is the default.

While at it, move the 'ALL_TRANFORMS' macro to meta-monitor-tranforms.h.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1287

src/tests/headless-start-test.c

@@ -31,7 +31,6 @@
 #include "tests/test-utils.h"
 #include "wayland/meta-wayland.h"
 
-#define ALL_TRANSFORMS ((1 << (META_MONITOR_TRANSFORM_FLIPPED_270 + 1)) - 1)
 #define FRAME_WARNING "Frame has assigned frame counter but no frame drawn time"
 
 static gboolean
@@ -143,7 +142,6 @@ meta_test_headless_monitor_connect (void)
                        "id", 1,
                        "gpu", gpu,
                        NULL);
-  crtc->all_transforms = ALL_TRANSFORMS;
   test_setup->crtcs = g_list_append (NULL, crtc);
 
   modes = g_new0 (MetaCrtcMode *, 1);

src/tests/monitor-test-utils.c

@@ -576,7 +576,6 @@ create_monitor_test_setup (MonitorTestCaseSetup *setup,
                            "id", i + 1,
                            "gpu", test_get_gpu (),
                            NULL);
-      crtc->all_transforms = ALL_TRANSFORMS;
 
       test_setup->crtcs = g_list_append (test_setup->crtcs, crtc);
     }

src/tests/monitor-test-utils.h

@@ -26,8 +26,6 @@
 #include "backends/meta-crtc.h"
 #include "backends/meta-output.h"
 
-#define ALL_TRANSFORMS ((1 << (META_MONITOR_TRANSFORM_FLIPPED_270 + 1)) - 1)
-
 #define MAX_N_MODES 10
 #define MAX_N_OUTPUTS 10
 #define MAX_N_CRTCS 10