Remove tarball.WithCompressedCaching flag to resolve OOM Killed error

Fixes GoogleContainerTools#1680
Large images cannot be build as the kaniko container will be killed due to an OOM error
Removing the tarball compression drastically reduces the memory required to push large image layers

pkg/executor/build.go

@@ -478,7 +478,7 @@ func (s *stageBuilder) saveSnapshotToLayer(tarPath string) (v1.Layer, error) {
 		return nil, nil
 	}
 
-	layer, err := tarball.LayerFromFile(tarPath, tarball.WithCompressedCaching)
+	layer, err := tarball.LayerFromFile(tarPath)
 	if err != nil {
 		return nil, err
 	}

pkg/executor/push.go

@@ -327,7 +327,7 @@ func writeImageOutputs(image v1.Image, destRefs []name.Tag) error {
 // pushLayerToCache pushes layer (tagged with cacheKey) to opts.Cache
 // if opts.Cache doesn't exist, infer the cache from the given destination
 func pushLayerToCache(opts *config.KanikoOptions, cacheKey string, tarPath string, createdBy string) error {
-	layer, err := tarball.LayerFromFile(tarPath, tarball.WithCompressedCaching)
+	layer, err := tarball.LayerFromFile(tarPath)
 	if err != nil {
 		return err
 	}