feat: allow helmfile to continue on failed releases

Co-authored-by: Peter Honeder <peter.honeder@unwired.at>
Signed-off-by: Niklas Ott <niklas.ott@unwired.at>

pkg/app/diff_test.go

@@ -25,6 +25,7 @@ type diffConfig struct {
 	skipCRDs                 bool
 	skipDeps                 bool
 	skipRefresh              bool
+	allowFailedReleases      bool
 	includeTests             bool
 	skipNeeds                bool
 	includeNeeds             bool
@@ -87,6 +88,10 @@ func (a diffConfig) SkipRefresh() bool {
 	return a.skipRefresh
 }
 
+func (a diffConfig) AllowFailedReleases() bool {
+	return a.allowFailedReleases
+}
+
 func (a diffConfig) IncludeTests() bool {
 	return a.includeTests
 }