### 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_COND((p_value.get_type() != Variant::VECTOR3) && (p_value.get_type() != Variant::VECTOR3I));
			ScaleTrack *st = static_cast<ScaleTrack *>(t);
			ERR_FAIL_COND(st->compressed_track >= 0);
			ERR_FAIL_INDEX(p_key_idx, st->scales.size());
			st->scales.write[p_key_idx].value = p_value;
		} break;
		case TYPE_BLEND_SHAPE: {
			ERR_FAIL_COND((p_value.get_type() != Variant::FLOAT) && (p_value.get_type() != Variant::INT));
			BlendShapeTrack *bst = static_cast<BlendShapeTrack *>(t);
			ERR_FAIL_COND(bst->compressed_track >= 0);
			ERR_FAIL_INDEX(p_key_idx, bst->blend_shapes.size());
			bst->blend_shapes.write[p_key_idx].value = p_value;
		} break;
		case TYPE_VALUE: {
			ValueTrack *vt = static_cast<ValueTrack *>(t);
			ERR_FAIL_INDEX(p_key_idx, vt->values.size());
			vt->values.write[p_key_idx].value = p_value;
		} break;
		case TYPE_METHOD: {
			MethodTrack *mt = static_cast<MethodTrack *>(t);
			ERR_FAIL_INDEX(p_key_idx, mt->methods.size());
			Dictionary d = p_value;
			if (d.has("method")) {
				mt->methods.write[p_key_idx].method = d["method"];
			}
			if (d.has("args")) {
				mt->methods.write[p_key_idx].params = d["args"];
			}
		} break;
		case TYPE_BEZIER: {