tests: bindesc: Replace CSTD definition with Kconfig symbols

Replace the bindesc testcase CSTD definitions with the newly introduced
kconfig symbols.

Signed-off-by: Pieter De Gendt <[email protected]>

Author: pdgendt

tests/subsys/bindesc/definition/testcase.yaml

@@ -22,14 +22,23 @@ tests:
       - qemu_riscv32e
       - qemu_riscv64
   bindesc.define.c99:
-    extra_args: CSTD="c99"
+    extra_configs:
+      - CONFIG_STD_C99=y
   bindesc.define.c11:
-    extra_args: CSTD="c11"
+    extra_configs:
+      - CONFIG_STD_C11=y
   bindesc.define.c17:
-    extra_args: CSTD="c17"
+    extra_configs:
+      - CONFIG_STD_C17=y
   bindesc.define.gnu99:
-    extra_args: CSTD="gnu99"
+    extra_configs:
+      - CONFIG_STD_C99=y
+      - CONFIG_GNU_C_EXTENSIONS=y
   bindesc.define.gnu11:
-    extra_args: CSTD="gnu11"
+    extra_configs:
+      - CONFIG_STD_C11=y
+      - CONFIG_GNU_C_EXTENSIONS=y
   bindesc.define.gnu17:
-    extra_args: CSTD="gnu17"
+    extra_configs:
+      - CONFIG_STD_C17=y
+      - CONFIG_GNU_C_EXTENSIONS=y