samples misc: Use hwmv2 native targets identifiers

For the 64 bit targets, change identifiers to the new hwmv2 ones.

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
diff --git a/samples/basic/hash_map/Kconfig b/samples/basic/hash_map/Kconfig
index a721e93..36ea330 100644
--- a/samples/basic/hash_map/Kconfig
+++ b/samples/basic/hash_map/Kconfig
@@ -18,7 +18,7 @@
 
 	  CONFIG_COMMON_LIBC_MALLOC_ARENA_SIZE
 
-	  For native_posix_64, the number of entries can be configured
+	  For native_sim, the number of entries can be configured
 	  independently of the arena size since the native libc is used.
 
 config TEST_LIB_HASH_MAP_DURATION_S
diff --git a/samples/modules/nanopb/sample.yaml b/samples/modules/nanopb/sample.yaml
index eb99084..06511ab 100644
--- a/samples/modules/nanopb/sample.yaml
+++ b/samples/modules/nanopb/sample.yaml
@@ -16,4 +16,4 @@
       - nanopb
     integration_platforms:
       - native_sim
-      - native_sim_64
+      - native_sim/native/64