Make the Sound Expressions effect default parameters/steps CODAL defaults

[microbit-carlos]

Neither MakeCode nor MicroPython expose to the users a way to change the fx params and steps.
For consistency we should use the same values for both platforms, to be able to generate the same sounds.
In that case it makes sense to make these the default values inside CODAL instead of having both platform setting the same values.

https://github.com/microsoft/pxt/blob/5e2ff19c7d44bc659b997530c96b7ac9ad6a6551/webapp/src/components/soundEffectEditor/soundUtil.ts#L24-L42

[martinwork]

Reported as a Python problem in support ticket https://support.microbit.org/helpdesk/tickets/70448 (private)

[microbit-carlos]

@JohnVidler the preferred MicroPython solution is to set the parameters as #defines and MicroPython can use those:

• SoundEffect fx value doesn't have an effect microbit-foundation/micropython-microbit-v2#155 (comment)

[JohnVidler]

I've defined a few SFX defaults over in this PR, would this do the trick?

#417

[microbit-carlos]

PR has been merged, next steps is to check that MicroPython is implementing it and submitting a PR to MakeCode.

[microbit-carlos]

MicroPython work tracked in:

• SoundEffect fx value doesn't have an effect microbit-foundation/micropython-microbit-v2#155 (comment)

MakeCode in:

• Request: Use CODAL defaults for SoundEffect vibrato, tremolo, and warble steps and params microsoft/pxt-microbit#5569

This CODAL issue can be closed as complete.