refactor Term (#2006)

* refactor Term

add ValueBytes for serialized term values
add missing debug for ip
skip unnecessary json path validation
remove code duplication
add DATE_TIME_PRECISION_INDEXED constant
add missing Term clarification
remove weird value_bytes_mut() API

* fix naming

src/query/term_query/mod.rs

@@ -175,7 +175,7 @@ mod tests {
         );
         assert_eq!(
             format!("{:?}", term_query),
-            r#"TermQuery(Term(type=Str, field=1, "hello"))"#
+            r#"TermQuery(Term(field=1, type=Str, "hello"))"#
         );
     }