### 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)

ERR_FAIL_INDEX_V(p_track, tracks.size(), HANDLE_MODE_FREE);
	Track *t = tracks[p_track];
	ERR_FAIL_COND_V(t->type != TYPE_BEZIER, HANDLE_MODE_FREE);
	BezierTrack *bt = static_cast<BezierTrack *>(t);
	ERR_FAIL_INDEX_V(p_index, bt->values.size(), HANDLE_MODE_FREE);
	return bt->values[p_index].value.handle_mode;
}
#endif 
real_t Animation::bezier_track_interpolate(int p_track, double p_time) const {
	
	ERR_FAIL_INDEX_V(p_track, tracks.size(), 0);
	Track *track = tracks[p_track];
	ERR_FAIL_COND_V(track->type != TYPE_BEZIER, 0);
	BezierTrack *bt = static_cast<BezierTrack *>(track);
	int len = _find(bt->values, length) + 1; 
	if (len <= 0) {
		
		return 0;
	} else if (len == 1) { 
		return bt->values[0].value.value;
	}
	int idx = _find(bt->values, p_time);
	ERR_FAIL_COND_V(idx == -2, 0);
	
	if (idx < 0) {
		return bt->values[0].value.value;