For OpenSearch, suppress_type_name should be default.

(check apply)
- [X] read [the contribution guideline](https://github.com/uken/fluent-plugin-elasticsearch/blob/master/CONTRIBUTING.md)

**Is your feature request related to a problem? Please describe.**

OpenSearch has done away with document types as of many versions ago. Rather than providing type names by default, this option should default to false and let the flag be set to true if desired for backwards compatibility.

**Describe the solution you'd like**

Output plugin opensearch should have 'suppress_type_name' enabled by default, and require disabling via flags in config.

**Describe alternatives you've considered**

N/A

**Additional context**

Just trying to make it easier for OpenSearch users to make use of fluent-bit.