change(examples): explicitly specify component dependencies for examples

Currently, several examples do not explicitly state their component
dependencies, relying instead on the default behavior that includes all
registered components and commonly required ones in the build.
Explicitly adding component dependencies can reduce build time when
set(COMPONENTS main) is used.

Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>

examples/protocols/sockets/tcp_client/main/CMakeLists.txt

@@ -1,9 +1,5 @@
 idf_build_get_property(target IDF_TARGET)
 
-if(${target} STREQUAL "linux")
-    set(requires esp_event esp_stubs protocol_examples_common nvs_flash)
-endif()
-
 if("${CONFIG_EXAMPLE_IPV4}" STREQUAL y)
     set(tcp_client_ip tcp_client_v4.c)
 else()
@@ -12,4 +8,4 @@ endif()
 
 idf_component_register(SRCS "tcp_client_main.c" "${tcp_client_ip}"
                                 INCLUDE_DIRS "."
-                                REQUIRES ${requires})
+                                PRIV_REQUIRES unity nvs_flash esp_netif)