### 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)

Dictionary d = p_value;
				ERR_FAIL_COND_V(!d.has("times"), false);
				ERR_FAIL_COND_V(!d.has("values"), false);
				if (d.has("cont")) {
					bool v = d["cont"];
					vt->update_mode = v ? UPDATE_CONTINUOUS : UPDATE_DISCRETE;
				}
				if (d.has("update")) {
					int um = d["update"];
					if (um < 0) {
						um = 0;
					} else if (um > 3) {
						um = 3;
					}
					vt->update_mode = UpdateMode(um);
				}
				Vector<real_t> times = d["times"];
				Array values = d["values"];
				ERR_FAIL_COND_V(times.size() != values.size(), false);
				if (times.size()) {
					int valcount = times.size();
					const real_t *rt = times.ptr();
					vt->values.resize(valcount);
					for (int i = 0; i < valcount; i++) {
						vt->values.write[i].time = rt[i];
						vt->values.write[i].value = values[i];
					}
					if (d.has("transitions")) {
						Vector<real_t> transitions = d["transitions"];
						ERR_FAIL_COND_V(transitions.size() != valcount, false);