Fixed path joining in FindFilesWithSuffixInPath (#704)

## Changes
Fixes #693 

## Tests
Newly added tests failed before the fix:
https://github.com/databricks/cli/actions/runs/6000754026/job/16273507998?pr=704

python/utils.go

@@ -5,7 +5,7 @@ package python
 import (
 	"context"
 	"os"
-	"path"
+	"path/filepath"
 	"strings"
 
 	"github.com/databricks/cli/libs/log"
@@ -13,8 +13,8 @@ import (
 
 func CleanupWheelFolder(dir string) {
 	// there or not there - we don't care
-	os.RemoveAll(path.Join(dir, "__pycache__"))
+	os.RemoveAll(filepath.Join(dir, "__pycache__"))
-	os.RemoveAll(path.Join(dir, "build"))
+	os.RemoveAll(filepath.Join(dir, "build"))
 	eggInfo := FindFilesWithSuffixInPath(dir, ".egg-info")
 	if len(eggInfo) == 0 {
 		return
@@ -42,7 +42,7 @@ func FindFilesWithSuffixInPath(dir, suffix string) []string {
 		if !strings.HasSuffix(child.Name(), suffix) {
 			continue
 		}
-		files = append(files, path.Join(dir, child.Name()))
+		files = append(files, filepath.Join(dir, child.Name()))
 	}
 	return files
 }

python/utils_test.go

@@ -0,0 +1,21 @@
+package python
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestFindFilesWithSuffixInPath(t *testing.T) {
+	dir, err := os.Getwd()
+	require.NoError(t, err)
+
+	files := FindFilesWithSuffixInPath(dir, "test.go")
+
+	matches, err := filepath.Glob(filepath.Join(dir, "*test.go"))
+	require.NoError(t, err)
+
+	require.ElementsMatch(t, files, matches)
+}