Merge branch 'bugfix/nvs-flash-erase-partition-leak_v6.1' into 'release/v6.1'

fix(nvs_flash): delete temporary NVSPartition after erase (v6.1)

See merge request espressif/esp-idf!50890

components/nvs_flash/src/nvs_api.cpp

@@ -250,8 +250,7 @@ extern "C" esp_err_t nvs_flash_erase_partition(const char *part_name)
 
     // erase the partition
     err = part->erase_range(0, part->get_size());
-
-    // No need to delete the partition here, as it is managed by the NVSPartitionManager.
+    delete part;
     return err;
 }