### 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)

return vt->values[p_key_idx].value;
		} break;
		case TYPE_METHOD: {
			MethodTrack *mt = static_cast<MethodTrack *>(t);
			ERR_FAIL_INDEX_V(p_key_idx, mt->methods.size(), Variant());
			Dictionary d;
			d["method"] = mt->methods[p_key_idx].method;
			d["args"] = mt->methods[p_key_idx].params;
			return d;
		} break;
		case TYPE_BEZIER: {
			BezierTrack *bt = static_cast<BezierTrack *>(t);
			ERR_FAIL_INDEX_V(p_key_idx, bt->values.size(), Variant());
			Array arr;
			arr.resize(5);
			arr[0] = bt->values[p_key_idx].value.value;
			arr[1] = bt->values[p_key_idx].value.in_handle.x;
			arr[2] = bt->values[p_key_idx].value.in_handle.y;
			arr[3] = bt->values[p_key_idx].value.out_handle.x;
			arr[4] = bt->values[p_key_idx].value.out_handle.y;
			return arr;
		} break;
		case TYPE_AUDIO: {
			AudioTrack *at = static_cast<AudioTrack *>(t);
			ERR_FAIL_INDEX_V(p_key_idx, at->values.size(), Variant());
			Dictionary k;
			k["start_offset"] = at->values[p_key_idx].value.start_offset;
			k["end_offset"] = at->values[p_key_idx].value.end_offset;
			k["stream"] = at->values[p_key_idx].value.stream;
			return k;