Fix import tests windows (#6412)

* use path.join to create dir path

* add eol rule for txtar files in .gitattributes

Author: wildum

.gitattributes

@@ -1 +1,3 @@
 pkg/operator/crds/*.yaml linguist-generated=true
+
+*.txtar text eol=lf

pkg/flow/import_test.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"io/fs"
 	"os"
+	"path"
 	"strings"
 	"sync"
 	"testing"
@@ -73,7 +74,7 @@ func buildTestImportFile(t *testing.T, filename string) testImportFile {
 func TestImportFile(t *testing.T) {
 	directory := "./testdata/import_file"
 	for _, file := range getTestFiles(directory, t) {
-		tc := buildTestImportFile(t, directory+"/"+file.Name())
+		tc := buildTestImportFile(t, path.Join(directory, file.Name()))
 		t.Run(tc.description, func(t *testing.T) {
 			defer os.Remove("module.river")
 			require.NoError(t, os.WriteFile("module.river", []byte(tc.module), 0664))
@@ -100,7 +101,7 @@ func TestImportFile(t *testing.T) {
 func TestImportString(t *testing.T) {
 	directory := "./testdata/import_string"
 	for _, file := range getTestFiles(directory, t) {
-		archive, err := txtar.ParseFile(directory + "/" + file.Name())
+		archive, err := txtar.ParseFile(path.Join(directory, file.Name()))
 		require.NoError(t, err)
 		t.Run(archive.Files[0].Name, func(t *testing.T) {
 			testConfig(t, string(archive.Files[0].Data), "", nil)
@@ -133,7 +134,7 @@ func buildTestImportError(t *testing.T, filename string) testImportError {
 func TestImportError(t *testing.T) {
 	directory := "./testdata/import_error"
 	for _, file := range getTestFiles(directory, t) {
-		tc := buildTestImportError(t, directory+"/"+file.Name())
+		tc := buildTestImportError(t, path.Join(directory, file.Name()))
 		t.Run(tc.description, func(t *testing.T) {
 			testConfigError(t, tc.main, strings.TrimRight(tc.expectedError, "\n"))
 		})