The speed and loop properties did not take effect when converting the sprite image to SpriteFrames object and saving it

### Tested versions

Godot_v4.3-stable_win64

### System information

window10

### Issue description

The speed and loop properties did not take effect when converting the sprite image to SpriteFrames object and saving it

### Steps to reproduce

```gdscript
func generate_animations(model_dictionary, save_path, animation_name):
var groupDic: Dictionary = {}

for filename in model_dictionary:
var sp = filename.split("_")
groupDic[sp[1]] = 1

var sprite_frames = SpriteFrames.new()
sprite_frames.remove_animation("default")

for direction in groupDic.keys():
var animation_direction = animation_name + "_" + direction

var texture_arr = file_helper.get_atlas_texture_by_prefix(animation_direction, model_dictionary)

sprite_frames.add_animation(animation_direction)

if texture_arr.size() > 0:
sprite_frames.set_animation_speed(animation_direction, texture_arr.size()/3 )
else:
print("No frames found for animation direction: " + animation_direction)

var loop:bool = false
if animation_name == "stand" || animation_name == "walk":
loop = true
sprite_frames.set_animation_loop(animation_direction,loop)
for texture in texture_arr:
sprite_frames.add_frame(animation_direction, texture)

# save
var result = ResourceSaver.save(sprite_frames, save_path + "/" + animation_name + ".tres", ResourceSaver.FLAG_REPLACE_SUBRESOURCE_PATHS)
print(str(result))

# debug
for anim_name in sprite_frames.get_animation_names():
print("Animation: " + anim_name + ", Speed: " + str(sprite_frames.get_animation_speed(anim_name)) + ", Loop: " + str(sprite_frames.get_animation_loop(anim_name)))
```

### Minimal reproduction project (MRP)

```gdscript
func generate_animations(model_dictionary, save_path, animation_name):
var groupDic: Dictionary = {}

for filename in model_dictionary:
var sp = filename.split("_")
groupDic[sp[1]] = 1

var sprite_frames = SpriteFrames.new()
sprite_frames.remove_animation("default")

for direction in groupDic.keys():
var animation_direction = animation_name + "_" + direction

var texture_arr = file_helper.get_atlas_texture_by_prefix(animation_direction, model_dictionary)

sprite_frames.add_animation(animation_direction)

if texture_arr.size() > 0:
sprite_frames.set_animation_speed(animation_direction, texture_arr.size()/3 )
else:
print("No frames found for animation direction: " + animation_direction)

var loop:bool = false
if animation_name == "stand" || animation_name == "walk":
loop = true
sprite_frames.set_animation_loop(animation_direction,loop)
for texture in texture_arr:
sprite_frames.add_frame(animation_direction, texture)

# save
var result = ResourceSaver.save(sprite_frames, save_path + "/" + animation_name + ".tres", ResourceSaver.FLAG_REPLACE_SUBRESOURCE_PATHS)
print(str(result))

# debug
for anim_name in sprite_frames.get_animation_names():
print("Animation: " + anim_name + ", Speed: " + str(sprite_frames.get_animation_speed(anim_name)) + ", Loop: " + str(sprite_frames.get_animation_loop(anim_name)))
```

_Bugsquad edit:_ Fix codeblock formatting.