tests/kernel: Run common tests using picolibc

This runs the existing kernel common tests using picolibc as some of those
depend on libc functionality.

Signed-off-by: Keith Packard <[email protected]>

Author: keith-packard

tests/kernel/common/testcase.yaml

@@ -26,3 +26,9 @@ tests:
     extra_configs:
       - CONFIG_CBPRINTF_NANO=y
       - CONFIG_CBPRINTF_FULL_INTEGRAL=y
+  kernel.common.picolibc:
+    filter: CONFIG_PICOLIBC_SUPPORTED
+    tags: picolibc
+    extra_configs:
+      - CONFIG_PICOLIBC=y
+      - CONFIG_PICOLIBC_ALIGNED_HEAP_SIZE=8192