Add support for `PATCH` in `HttpConnection.ConvertHttpMethod` #1337

Job	Run time
Integration OpenSearch (2.9.0)	8m 16s
Integration OpenSearch (2.8.0)	6m 23s
Integration OpenSearch (2.7.0)	6m 33s
Integration OpenSearch (2.6.0)	7m 30s
Integration OpenSearch (2.5.0)	6m 18s
Integration OpenSearch (2.4.1)	6m 19s
Integration OpenSearch (2.3.0)	6m 6s
Integration OpenSearch (2.2.1)	6m 4s
Integration OpenSearch (2.1.0)	6m 10s
Integration OpenSearch (2.0.1)	6m 15s
Integration OpenSearch (1.3.11)	6m 31s
Integration OpenSearch Unreleased	0s
Integration OpenSearch (1.2.4)	6m 27s
Integration OpenSearch (1.1.0)	6m 5s
	1h 24m 57s

Provide feedback