tests: net: socketpair: coverage for all C libraries

Previously, the test was only run for configurations that used
the Newlib C library. However, socketpair runs equally well
under the minimal libc, and picolibc, as well as the native
libc.

Signed-off-by: Chris Friedt <[email protected]>

Author: cfriedt

tests/net/socket/socketpair/prj.conf

@@ -1,6 +1,3 @@
-# General config
-CONFIG_NEWLIB_LIBC=y
-
 # Networking config
 CONFIG_NETWORKING=y
 CONFIG_NET_TEST=y

tests/net/socket/socketpair/testcase.yaml

@@ -1,8 +1,15 @@
 common:
   tags: net socket userspace
-  filter: TOOLCHAIN_HAS_NEWLIB == 1
   platform_exclude: intel_adsp_cavs15
   depends_on: netif
+  min_ram: 21
 tests:
-  net.socket.socketpair:
-    min_ram: 21
+  net.socket.socketpair: {}
+  net.socket.socketpair.newlib:
+    filter: TOOLCHAIN_HAS_NEWLIB == 1
+    extra_configs:
+      - CONFIG_NEWLIB_LIBC=y
+  net.socket.socketpair.picolibc:
+    filter: CONFIG_PICOLIBC_SUPPORTED
+    extra_configs:
+      - CONFIG_PICOLIBC=y