Append --force-update for specific helm versions. (#1494)

* Parse and process helm version using github.com/Masterminds/semver/v3.

* Add --force-update only when Helm version >= 3.3.2, < 3.3.4.

See: https://github.com/helm/helm/pull/8777.

* Add test cases.

pkg/helmexec/helmexec.go

@@ -28,7 +28,7 @@ type Interface interface {
 	DecryptSecret(context HelmContext, name string, flags ...string) (string, error)
 	IsHelm3() bool
 	GetVersion() Version
-	IsVersionAtLeast(major int, minor int, patch int) bool
+	IsVersionAtLeast(versionStr string) bool
 }
 
 type DependencyUpdater interface {