chore(docker_mounts): stop doing misleading logging

As things are, the logger statement here always triggers for normal use cases.
For example, if I start a container with this mount:
testcontainers.VolumeMount("some-vol", "/some/dir")

then I get this weird message in my logs
Mount type %!s(testcontainers.MountType=1) is not supported by Testcontainers for Go

because a GenericVolumeMountSource doesn't have an implementation of
`GetVolumeOptions() *mount.VolumeOptions`

I suggest removing that logging, as in this PR, because it's going to be purely
confusing for 99% of users.

docker_mounts.go

@@ -107,8 +107,10 @@ func mapToDockerMounts(containerMounts ContainerMounts) []mount.Mount {
 			containerMount.VolumeOptions = typedMounter.GetVolumeOptions()
 		case TmpfsMounter:
 			containerMount.TmpfsOptions = typedMounter.GetTmpfsOptions()
-		default:
+		case BindMounter:
 			Logger.Printf("Mount type %s is not supported by Testcontainers for Go", m.Source.Type())
+		default:
+			// The provided source type has no custom options
 		}
 
 		mounts = append(mounts, containerMount)