fix: Fix create timestamp cmp for aws_appstream_image data source

.changelog/38571.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+data-source/aws_appstream_image: Fix issue where the most recent image is not returned
+```

internal/service/appstream/image_data_source.go

@@ -5,8 +5,7 @@ package appstream
 
 import (
 	"context"
-	"sort"
-	"time"
+	"slices"
 
 	"github.com/YakDriver/regexache"
 	"github.com/aws/aws-sdk-go-v2/aws"
@@ -202,15 +201,19 @@ func (d *dataSourceImage) Read(ctx context.Context, req datasource.ReadRequest,
 			)
 			return
 		}
-		sort.Slice(filteredImages, func(i, j int) bool {
-			itime, _ := time.Parse(time.RFC3339, images[i].CreatedTime.Month().String())
-			jtime, _ := time.Parse(time.RFC3339, images[j].CreatedTime.Month().String())
-			return itime.Unix() > jtime.Unix()
+		slices.SortFunc(filteredImages, func(a, b awstypes.Image) int {
+			if aws.ToTime(a.CreatedTime).After(aws.ToTime(b.CreatedTime)) {
+				return -1
+			}
+			if aws.ToTime(a.CreatedTime).Before(aws.ToTime(b.CreatedTime)) {
+				return 1
+			}
+			return 0
 		})
 	}
 	image := filteredImages[0]
 
-	data.Type = fwtypes.StringEnumValue[awstypes.VisibilityType](image.Visibility)
+	data.Type = fwtypes.StringEnumValue(image.Visibility)
 	resp.Diagnostics.Append(flex.Flatten(ctx, &image, &data)...)
 	if resp.Diagnostics.HasError() {
 		return