Support mTLS connection to Temporal server

[feedmeapples]

What was changed

Adds support for mTLS

Why?

Allows communicating with secured Temporal server

Checklist

1. Closes

2. How was this tested:

1. Run Temporal server with mTLS not set. Run ui-server and verify that namespaces and other data is loaded

2. Run secured Temporal server using https://github.com/temporalio/samples-server/tree/main/tls/tls-simple

• set TLS config in development.yaml

tls:
  сaFile: /home/USERNAME/samples-server/tls/tls-simple/certs/ca.cert
  certFile: /home/USERNAME/samples-server/tls/tls-simple/certs/cluster.pem
  keyFile: /home/USERNAME/samples-server/tls/tls-simple/certs/cluster.key
  enableHostVerification: true
  serverName: tls-sample

• verify namespaces and other data calls succeed

3. Any docs updates needed?