### Tested versions

- Reproducible in: v4.2.stable.official [46dc27791]
- Not reproducible in: v4.1.3.stable

### System information

Godot v4.2.stable - Windows 10.0.22621 - Vulkan (Forward+) - dedicated AMD Radeon RX 6600 (Advanced Micro Devices, Inc.; 31.0.21023.2010) - AMD Ryzen 7 5700X 8-Core Processor (16 Threads)

### Issue description

Starting with Godot 4.2, changing a Control node's anchor offsets with an AnimationPlayer node results in the offsets "snapping" to the keyframes, as if Nearest interpolation were used. 

This only applies to the Linear Interpolation Mode; Cubic still works as expected.

![resize_interp_fail](https://github.com/godotengine/godot/assets/26508550/a10a973f-afdc-45f2-986c-594aa3cdc9dc)

I encountered this regression when upgrading my project from 4.1.3 to 4.2. Minimum reproduction project provided below.

### Steps to reproduce

- Create a Control node with a Custom anchor preset.
- Create an AnimationPlayer track for one or more of its anchor offsets, with the Continuous update mode and Linear interpolation.
- Add keyframes to track(s)
- Play animation (either in the editor or in-game)

### Minimal reproduction project (MRP)

[ControlResize.zip](https://github.com/godotengine/godot/files/13589517/ControlResize.zip)

Vector3 ret = Vector3(1, 1, 1);
	ERR_FAIL_INDEX_V(p_track, tracks.size(), ret);
	bool err = try_scale_track_interpolate(p_track, p_time, &ret);
	ERR_FAIL_COND_V_MSG(err, ret, "3D Scale Track: '" + tracks[p_track]->path + "' is unavailable.");
	return ret;
}
int Animation::blend_shape_track_insert_key(int p_track, double p_time, float p_blend_shape) {
	ERR_FAIL_INDEX_V(p_track, tracks.size(), -1);
	Track *t = tracks[p_track];
	ERR_FAIL_COND_V(t->type != TYPE_BLEND_SHAPE, -1);
	BlendShapeTrack *st = static_cast<BlendShapeTrack *>(t);
	ERR_FAIL_COND_V(st->compressed_track >= 0, -1);
	TKey<float> tkey;
	tkey.time = p_time;
	tkey.value = p_blend_shape;
	int ret = _insert(p_time, st->blend_shapes, tkey);
	emit_changed();
	return ret;
}
Error Animation::blend_shape_track_get_key(int p_track, int p_key, float *r_blend_shape) const {