fix: reduce warn levels to debug for non-actionable errors (#3645)

Signed-off-by: Keith Zantow <kzantow@gmail.com>

syft/pkg/cataloger/golang/config.go

@@ -80,7 +80,7 @@ func defaultGoModDir() string {
 	if goPath == "" {
 		homeDir, err := homedir.Dir()
 		if err != nil {
-			log.Warnf("unable to determine GOPATH or user home dir: %w", err)
+			log.Debugf("unable to determine GOPATH or user home dir: %w", err)
 			return ""
 		}
 		goPath = filepath.Join(homeDir, "go")

syft/pkg/cataloger/golang/licenses.go

@@ -60,7 +60,7 @@ func newGoLicenseResolver(catalogerName string, opts CatalogerConfig) goLicenseR
 		if vendorDir == "" {
 			wd, err := os.Getwd()
 			if err != nil {
-				log.Warn("unable to get CWD while resolving the local go vendor dir: %v", err)
+				log.Debug("unable to get CWD while resolving the local go vendor dir: %v", err)
 			} else {
 				vendorDir = filepath.Join(wd, "vendor")
 			}

syft/pkg/cataloger/golang/scan_binary.go

@@ -26,7 +26,7 @@ func scanFile(location file.Location, reader unionreader.UnionReader) ([]*extend
 	// with more than one binary
 	readers, errs := unionreader.GetReaders(reader)
 	if errs != nil {
-		log.WithFields("error", errs).Warnf("failed to open a golang binary")
+		log.WithFields("error", errs).Debug("failed to open a golang binary")
 		return nil, fmt.Errorf("failed to open a golang binary: %w", errs)
 	}