### 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)

a.size.cubic_interpolate_in_time(b.size, pa.size, pb.size, p_c, p_b_t, p_pre_a_t, p_post_b_t));
		}
		default: {
			return _interpolate(p_a, p_b, p_c);
		}
	}
}
real_t Animation::_cubic_interpolate_in_time(const real_t &p_pre_a, const real_t &p_a, const real_t &p_b, const real_t &p_post_b, real_t p_c, real_t p_pre_a_t, real_t p_b_t, real_t p_post_b_t) const {
	return Math::cubic_interpolate_in_time(p_a, p_b, p_pre_a, p_post_b, p_c, p_b_t, p_pre_a_t, p_post_b_t);
}
Variant Animation::_cubic_interpolate_angle_in_time(const Variant &p_pre_a, const Variant &p_a, const Variant &p_b, const Variant &p_post_b, real_t p_c, real_t p_pre_a_t, real_t p_b_t, real_t p_post_b_t) const {
	Variant::Type type_a = p_a.get_type();
	Variant::Type type_b = p_b.get_type();
	Variant::Type type_pa = p_pre_a.get_type();
	Variant::Type type_pb = p_post_b.get_type();
	uint32_t vformat = 1 << type_a;
	vformat |= 1 << type_b;
	vformat |= 1 << type_pa;
	vformat |= 1 << type_pb;
	if (vformat == ((1 << Variant::INT) | (1 << Variant::FLOAT)) || vformat == (1 << Variant::FLOAT)) {
		real_t a = p_a;
		real_t b = p_b;
		real_t pa = p_pre_a;
		real_t pb = p_post_b;
		return Math::fposmod((float)Math::cubic_interpolate_angle_in_time(a, b, pa, pb, p_c, p_b_t, p_pre_a_t, p_post_b_t), (float)Math_TAU);
	}
	return _interpolate(p_a, p_b, p_c);
}
template <class T>
T Animation::_interpolate(const Vector<TKey<T>> &p_keys, double p_time, InterpolationType p_interp, bool p_loop_wrap, bool *p_ok, bool p_backward) const {