Pop when enabling audio filter, such as LowPassFilter

### Tested versions

4.0 - 4.3 rc2

### System information

Windows 10, Vulkan forward +, Nvidia 3070

### Issue description

When enabling filters on a bus, there can be a pop or crack, depending on the wave form when the filter is enabled. For example, I enable a low pass filter when the player enters the water, and sometimes there's a very audible click or pop.

### Steps to reproduce

1. Add a LowPassFilter to the Master bus.
2. Toggle it on and and off with AudioServer.set_bus_effect_enabled()
3. Note that sometimes there's a pretty glaring pop.

### Minimal reproduction project (MRP)

[test_filter_pop.zip](https://github.com/user-attachments/files/16554589/test_filter_pop.zip)

Start with the attached test_filter_pop.zip reproduction project and reproduce the issue by toggling the effect through AudioServer.set_bus_effect_enabled(). Trace the audio filter enable path and verify that enabling or disabling a LowPassFilter no longer produces an audible pop across the provided reproduction steps.

Written by the indexing model from the issue text.