Allow colons in windows file paths

the `podman save` command was failing on windows due to the use of a
colon between the drive letter and first directory.  the check was
intended for Linux and not windows.

Fixes #15247

[NO NEW TESTS NEEDED]

Signed-off-by: Brent Baude <bbaude@redhat.com>

cmd/podman/parse/net.go

@@ -151,15 +151,6 @@ func parseEnvOrLabelFile(envOrLabel map[string]string, filename, configType stri
 	return scanner.Err()
 }
 
-// ValidateFileName returns an error if filename contains ":"
-// as it is currently not supported
-func ValidateFileName(filename string) error {
-	if strings.Contains(filename, ":") {
-		return fmt.Errorf("invalid filename (should not contain ':') %q", filename)
-	}
-	return nil
-}
-
 // ValidURL checks a string urlStr is a url or not
 func ValidURL(urlStr string) error {
 	url, err := url.ParseRequestURI(urlStr)

cmd/podman/parse/parse.go

@@ -0,0 +1,18 @@
+//go:build !windows
+// +build !windows
+
+package parse
+
+import (
+	"fmt"
+	"strings"
+)
+
+// ValidateFileName returns an error if filename contains ":"
+// as it is currently not supported
+func ValidateFileName(filename string) error {
+	if strings.Contains(filename, ":") {
+		return fmt.Errorf("invalid filename (should not contain ':') %q", filename)
+	}
+	return nil
+}

cmd/podman/parse/parse_windows.go

@@ -0,0 +1,5 @@
+package parse
+
+func ValidateFileName(filename string) error {
+	return nil
+}