InfluxDB: Fix Unable to use self-signed CA for adding influxdb data source (#105586)

* Fix Unable to use self-signed CA for verification when adding influxdb data source (#105585)

* Update pkg/tsdb/influxdb/fsql/fsql.go

---------

Co-authored-by: Andrew Hackmann <5140848+bossinc@users.noreply.github.com>

pkg/tsdb/influxdb/models/datasource_info.go

@@ -4,6 +4,7 @@ import (
 	"net/http"
 	"time"
 
+	"github.com/grafana/grafana-plugin-sdk-go/backend/httpclient"
 	"github.com/grafana/grafana-plugin-sdk-go/backend/proxy"
 )
 
@@ -25,5 +26,7 @@ type DatasourceInfo struct {
 	// FlightSQL grpc connection
 	InsecureGrpc bool `json:"insecureGrpc"`
 
+	TLSConfig *httpclient.TLSOptions
+
 	ProxyClient proxy.Client
 }