Bundle: Add helper function to get bundle name with extension

The previous commit introduced a warning when crc setup is used with
its -b option, and when the bundle version does not correspond to the
one hardcoded in crc's Makefile. However, if the bundle is unpacked and
one uses `crc setup -b ~/.crc/cache/crc_libvirt_4.11.1_amd64`, the warning
will also be printed because crc_libvirt_4.11.1_amd64 (without
extention) is different from the expected crc_libvirt_4.11.1_amd64.crcbundle.
While it's questionable if -b should accept a path or not, this has been working until now.

This commit introduces a GetBundleNameWithExtension() helper which will be used to silence incorrect warning.
```
$ crc setup -b ~/.crc/cache/crc_libvirt_4.11.1_amd64
WARN Using crc_libvirt_4.11.1_amd64 bundle, but crc_libvirt_4.11.1_amd64.crcbundle is expected for this release
```

pkg/crc/machine/bundle/metadata.go

@@ -237,6 +237,13 @@ func GetBundleNameWithoutExtension(bundleName string) string {
 	return strings.TrimSuffix(bundleName, bundleExtension)
 }
 
+func GetBundleNameWithExtension(bundleName string) string {
+	if strings.HasSuffix(bundleName, bundleExtension) {
+		return bundleName
+	}
+	return fmt.Sprintf("%s%s", bundleName, bundleExtension)
+}
+
 func GetCustomBundleName(bundleFilename string) string {
 	re := regexp.MustCompile(`(?:_[0-9]+)*.crcbundle$`)
 	baseName := re.ReplaceAllLiteralString(bundleFilename, "")

pkg/crc/validation/validation.go

@@ -61,6 +61,7 @@ func ValidateBundlePath(bundlePath string, preset crcpreset.Preset) error {
 	}
 
 	userProvidedBundle := filepath.Base(bundlePath)
+	userProvidedBundle = bundle.GetBundleNameWithExtension(userProvidedBundle)
 	if userProvidedBundle != constants.GetDefaultBundle(preset) {
 		// Should append underscore (_) here, as we don't want crc_libvirt_4.7.15.crcbundle
 		// to be detected as a custom bundle for crc_libvirt_4.7.1.crcbundle