Add mTLS settings to ApiClient #1515

Job	Run time
Build Reaper	5m 25s
Docker Image Tests (cassandra, docker)	36m 59s
Memory backends (binary:3.0.25, local, ccm)	16m 34s
HTTP Management (binary:4.0.6, ccm, http-api, 1, 1)	48m 31s
Cassandra backend (binary:3.0.25, cassandra, ccm)	18m 17s
Memory backends (binary:3.11.16, local, ccm)	17m 41s
HTTP Management (binary:3.11.16, ccm, http-api, 1, 1)	48m 24s
Cassandra backend (binary:3.11.16, cassandra, ccm)	21m 26s
Memory backends (binary:4.0.6, local, ccm)	19m 49s
Cassandra backend (binary:4.0.6, cassandra, ccm)	23m 53s
Sidecar	0s
Flapping reapers	0s
Each DC Availability	0s
Distributed tests	0s
Release Reaper	0s
	4h 16m 59s

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