samples/net/sockets/*: Use hwmv2 native targets identifiers

For the 64 bit targets, change identifiers to the new hwmv2 ones.
And remove redundant overlays (which were equal for the 32
and 64 bit versions)

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>

samples/net/sockets/coap_server/boards/native_posix_64.conf

@@ -1,3 +0,0 @@
-CONFIG_NET_L2_ETHERNET=y
-CONFIG_NATIVE_POSIX_SLOWDOWN_TO_REAL_TIME=y
-CONFIG_NATIVE_UART_0_ON_STDINOUT=y

samples/net/sockets/coap_server/boards/native_sim_64.conf

@@ -1,4 +0,0 @@
-CONFIG_NET_L2_ETHERNET=y
-CONFIG_NATIVE_SIM_SLOWDOWN_TO_REAL_TIME=y
-CONFIG_NATIVE_UART_0_ON_STDINOUT=y
-CONFIG_PICOLIBC=y

samples/net/sockets/echo_service/sample.yaml

@@ -8,7 +8,7 @@ common:
   # eventfd does not work properly with native_posix so exclude it here
   platform_exclude:
     - native_posix
-    - native_posix_64
+    - native_posix/native/64
 tests:
   sample.net.sockets.service.echo:
     tags:

samples/net/sockets/packet/sample.yaml

@@ -6,9 +6,9 @@ tests:
     harness: net
     platform_allow:
       - native_posix
-      - native_posix_64
+      - native_posix/native/64
       - native_sim
-      - native_sim_64
+      - native_sim/native/64
     integration_platforms:
       - native_sim
     tags:

samples/net/sockets/txtime/sample.yaml

@@ -4,9 +4,9 @@ common:
   # We can only run this in platforms that support PTP clock and TXTIME
   platform_allow:
     - native_posix
-    - native_posix_64
+    - native_posix/native/64
     - native_sim
-    - native_sim_64
+    - native_sim/native/64
     - qemu_x86
     - qemu_x86_64
   integration_platforms: