samples: Fix filtering on UART_CONSOLE

There were a few different issues with the UART_CONSOLE filtering:
* Filter was incorrect - UART_CONSOLE should be CONFIG_UART_CONSOLE
* platform_exclude was used for drivers that had a #error for lack of
  interrupt support.  We can now use CONFIG_SERIAL_SUPPORT_INTERRUPT in
  the filter for that.  This catches all the various drivers that needed
  don't support uart interrupts, not just the onces that had a #error

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>

samples/subsys/console/echo/sample.yaml

@@ -4,6 +4,5 @@ sample:
 tests:
 -   test:
         build_only: true
-        filter: CONFIG_UART_CONSOLE
-        platform_exclude: qemu_riscv32 qemu_nios2
+        filter: CONFIG_UART_CONSOLE and CONFIG_SERIAL_SUPPORT_INTERRUPT
         tags: samples

samples/subsys/console/getchar/sample.yaml

@@ -4,6 +4,5 @@ sample:
 tests:
 -   test:
         build_only: true
-        filter: UART_CONSOLE
-        platform_exclude: qemu_riscv32 qemu_nios2
+        filter: CONFIG_UART_CONSOLE and CONFIG_SERIAL_SUPPORT_INTERRUPT
         tags: samples

samples/subsys/console/getline/sample.yaml

@@ -4,6 +4,5 @@ sample:
 tests:
 -   test:
         build_only: true
-        filter: UART_CONSOLE
-        platform_exclude: qemu_riscv32 qemu_nios2
+        filter: CONFIG_UART_CONSOLE and CONFIG_SERIAL_SUPPORT_INTERRUPT
         tags: samples

samples/subsys/shell/shell/sample.yaml

@@ -4,5 +4,5 @@ sample:
 tests:
 -   test:
         build_only: true
-        filter: UART_CONSOLE
+        filter: CONFIG_UART_CONSOLE and CONFIG_SERIAL_SUPPORT_INTERRUPT
         tags: samples