PHOENIX-7976: Introduce new parameters to support single-purpose Extended Key Usage (EKU) certificates (#194)

To maintain compatibility assume that the current parameters are still Dual-purpose EKU certs and introduce new parameters.
Fall back to the old parameters if the new one is not available.

Current params:
"phoenix.queryserver.tls.keystore";
"phoenix.queryserver.tls.truststore.password";
"phoenix.queryserver.tls.keystore.password";
"phoenix.queryserver.tls.truststore";

New proposed parameters:
"phoenix.queryserver.tls.server.keystore";
"phoenix.queryserver.tls.server.keystore.password";
"phoenix.queryserver.tls.server.truststore";
"phoenix.queryserver.tls.server.truststore.password";