fix(BRIDGE-406): fixed faulty certificate chain validation logic; made certificate pin checks exclusive to leaf certs;

internal/dialer/dialer_pinning_checker_qa.go

@@ -23,6 +23,6 @@ import "net"
 
 // CheckCertificate returns whether the connection presents a known TLS certificate.
 // The QA implementation always returns nil.
-func (p *TLSPinChecker) CheckCertificate(conn net.Conn) error {
+func (p *TLSPinChecker) CheckCertificate(conn net.Conn, _ bool) error {
 	return nil
 }