samples: can: filter out tests if zephyr,canbus not enabled

- Filter out the remaining CAN tests if no zephyr,canbus chosen node is
  enabled in the devicetree.
- Rename the tests to shorten the name a bit.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>

samples/drivers/can/sample.yaml

@@ -2,8 +2,9 @@ sample:
   name: CAN driver sample
 tests:
   sample.drivers.can:
-    tags: CAN
+    tags: can
     depends_on: can
+    filter: dt_chosen_enabled("zephyr,canbus")
     harness: console
     harness_config:
       type: one_line

samples/net/sockets/can/sample.yaml

@@ -1,14 +1,14 @@
+sample:
+  name: SocketCAN sample
 common:
-  tags: net socket can CAN
+  tags: net socket can
+  filter: dt_chosen_enabled("zephyr,canbus")
   depends_on: can
   harness: can
-sample:
-  description: Test BSD sockets CAN support
-  name: Socket CAN example
 tests:
-  sample.net.sockets.can.test_with_one_socket:
+  sample.net.sockets.can.one_socket:
     extra_configs:
       - CONFIG_NET_SOCKETS_CAN_RECEIVERS=1
-  sample.net.sockets.can.test_with_two_sockets:
+  sample.net.sockets.can.two_sockets:
     extra_configs:
       - CONFIG_NET_SOCKETS_CAN_RECEIVERS=2

samples/subsys/canbus/isotp/sample.yaml

@@ -2,8 +2,9 @@ sample:
   name: ISO-TP lib sample
 tests:
   sample.subsys.canbus.isotp:
-    tags: CAN
+    tags: can
     depends_on: can
+    filter: dt_chosen_enabled("zephyr,canbus")
     harness: console
     harness_config:
       type: one_line