### 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)

p_keys[pre].value, p_keys[idx].value, p_keys[next].value, p_keys[post].value, c,
					pre_t, to_t, post_t);
		} break;
		default:
			return p_keys[idx].value;
	}
	
}
Variant Animation::value_track_interpolate(int p_track, double p_time) const {
	ERR_FAIL_INDEX_V(p_track, tracks.size(), 0);
	Track *t = tracks[p_track];
	ERR_FAIL_COND_V(t->type != TYPE_VALUE, Variant());
	ValueTrack *vt = static_cast<ValueTrack *>(t);
	bool ok = false;
	Variant res = _interpolate(vt->values, p_time, (vt->update_mode == UPDATE_CONTINUOUS || vt->update_mode == UPDATE_CAPTURE) ? vt->interpolation : INTERPOLATION_NEAREST, vt->loop_wrap, &ok);
	if (ok) {
		return res;
	}
	return Variant();
}
void Animation::value_track_set_update_mode(int p_track, UpdateMode p_mode) {
	ERR_FAIL_INDEX(p_track, tracks.size());
	Track *t = tracks[p_track];
	ERR_FAIL_COND(t->type != TYPE_VALUE);
	ERR_FAIL_INDEX((int)p_mode, 3);
	ValueTrack *vt = static_cast<ValueTrack *>(t);
	vt->update_mode = p_mode;
	emit_changed();
}
Animation::UpdateMode Animation::value_track_get_update_mode(int p_track) const {