* Use `StandardCharsets.UTF_8` as a charset configuration instead of string. Later remove the necessity of handling encoder errors. * Use regular expressions to validate the `UUID` string standard representation. Later obsolete the need for try/catch exceptions. * Deprecate `UUIDConverter.DEFAULT_CHARSET` since it is out of use. **Cherry-pick to `6.1.x` & `6.0.x`** Code clean up for `UUIDConverter`