### 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)

if (temp_packets.size() >= MIN_OPTIMIZE_PACKETS) {
			uint32_t max_shifts[3] = { 0, 0, 0 }; 
			uint32_t max_frame_delta_shift = 0;
			
			_compute_max_shifts(0, temp_packets.size() - 2, max_shifts, max_frame_delta_shift);
			float prev_packet_size_avg = 0;
			prev_packet_size_avg = float(1 << max_frame_delta_shift);
			for (uint32_t i = 0; i < components; i++) {
				prev_packet_size_avg += float(1 << max_shifts[i]);
			}
			prev_packet_size_avg /= float(1 + components);
			_compute_max_shifts(temp_packets.size() - 2, temp_packets.size() - 1, max_shifts, max_frame_delta_shift);
			float new_packet_size_avg = 0;
			new_packet_size_avg = float(1 << max_frame_delta_shift);
			for (uint32_t i = 0; i < components; i++) {
				new_packet_size_avg += float(1 << max_shifts[i]);
			}
			new_packet_size_avg /= float(1 + components);
			print_animc("packet count: " + rtos(temp_packets.size() - 1) + " size avg " + rtos(prev_packet_size_avg) + " new avg " + rtos(new_packet_size_avg));
			float ratio = (prev_packet_size_avg < new_packet_size_avg) ? (new_packet_size_avg / prev_packet_size_avg) : (prev_packet_size_avg / new_packet_size_avg);
			if (ratio > split_tolerance) {
				print_animc("split!");
				temp_packets.resize(temp_packets.size() - 1);
				commit_temp_packets();
				temp_packets.push_back(packet);
			}
		}
		return temp_packets.size() == 1; 
	}
	uint32_t get_temp_packet_size() const {