feature, strlen are rarely called in jerry-core and jerry-ext, we can remove all the usage of strlen

[lygstate]

All the place calling to strlen are

Name	Line	Text	Path
jerry-debugger.c	150	          size_t source_name_size = strlen ((const char *) source_name_p);	E:\CI-Cor\acrop\acrop-deps\acrop-jerry\jerryscript\jerry-core\api
jerryscript.c	5091	                                strlen (str_p));	E:\CI-Cor\acrop\acrop-deps\acrop-jerry\jerryscript\jerry-core\api
jerry-snapshot.c	1472	    string_size = (lit_utf8_size_t) strlen (chars);	E:\CI-Cor\acrop\acrop-deps\acrop-jerry\jerryscript\jerry-core\api
debugger.c	599	        jerry_debugger_send_string (JERRY_DEBUGGER_EVAL_RESULT, type, string_p, strlen ((const char *) string_p));	E:\CI-Cor\acrop\acrop-deps\acrop-jerry\jerryscript\jerry-core\debugger
lit-strings.c	267	  return (lit_utf8_size_t) strlen ((const char *) utf8_str_p);	E:\CI-Cor\acrop\acrop-deps\acrop-jerry\jerryscript\jerry-core\lit
module.c	187	    if (module_p->name_p != NULL && strlen ((char *) module_p->name_p) == name_size	E:\CI-Cor\acrop\acrop-deps\acrop-jerry\jerryscript\jerry-ext\module
print.c	153	  jerry_size_t buffer_size = (jerry_size_t) (strlen (str_p));	E:\CI-Cor\acrop\acrop-deps\acrop-jerry\jerryscript\jerry-ext\util
sources.c	50	    jerry_string ((const jerry_char_t *) path_p, (jerry_size_t) strlen (path_p), JERRY_ENCODING_UTF8);	E:\CI-Cor\acrop\acrop-deps\acrop-jerry\jerryscript\jerry-ext\util
sources.c	79	    jerry_string ((const jerry_char_t *) path_p, (jerry_size_t) strlen (path_p), JERRY_ENCODING_UTF8);	E:\CI-Cor\acrop\acrop-deps\acrop-jerry\jerryscript\jerry-ext\util
main-snapshot.c	342	    jerry_string ((const jerry_char_t *) file_name_p, (jerry_size_t) strlen (file_name_p), JERRY_ENCODING_UTF8);	E:\CI-Cor\acrop\acrop-deps\acrop-jerry\jerryscript\jerry-main
main-snapshot.c	348	                                                (jerry_size_t) strlen (function_args_p),	E:\CI-Cor\acrop\acrop-deps\acrop-jerry\jerryscript\jerry-main

We can improve the usage of strlen by improving the api of jerry-port and other related functions

[LaszloLango]

#4982 did not fix this completely, so I reopened the issue.