fix(api): Use the new sliding sync version API from the Rust SDK

[Hywan]

Anticipating the merge of matrix-org/matrix-rust-sdk#3889. The configuration of sliding sync on the Client has changed. This patch updates this project to match this change.

Please wait for the PR on matrix-rust-sdk to be merged before merging this one.

[Hywan]

It seems that we are hitting a bug in uniffi-go sadly… It fails to transform the SlidingSyncVersionBuilderProxy into a correct Rust value with the following error:

panic: invalid enum value `&{http://127.0.0.1:32779/}` in FfiConverterTypeSlidingSyncVersionBuilder.Write

which is an error generated by uniffi-go:

func (FfiConverterTypeSlidingSyncVersionBuilder) Write(writer io.Writer, value SlidingSyncVersionBuilder) {
	switch variant_value := value.(type) {
	case SlidingSyncVersionBuilderNone:
		writeInt32(writer, 1)
	case SlidingSyncVersionBuilderProxy:
		writeInt32(writer, 2)
		FfiConverterStringINSTANCE.Write(writer, variant_value.Url)
	case SlidingSyncVersionBuilderNative:
		writeInt32(writer, 3)
	case SlidingSyncVersionBuilderDiscoverProxy:
		writeInt32(writer, 4)
	case SlidingSyncVersionBuilderDiscoverNative:
		writeInt32(writer, 5)
	default:
		_ = variant_value
		panic(fmt.Sprintf("invalid enum value `%v` in FfiConverterTypeSlidingSyncVersionBuilder.Write", value))
	}
}

In this patch, the value is:

	slidingSyncVersion := matrix_sdk_ffi.SlidingSyncVersionBuilderProxy{Url: opts.SlidingSyncURL}

which looks correct to me.

The following code is generated:

type FfiDestroyerTypeSlidingSyncVersion struct{}

func (_ FfiDestroyerTypeSlidingSyncVersion) Destroy(value SlidingSyncVersion) {
	value.Destroy()
}

type SlidingSyncVersionBuilder interface {
	Destroy()
}

type SlidingSyncVersionBuilderProxy struct {
	Url string
}

func (e SlidingSyncVersionBuilderProxy) Destroy() {
	FfiDestroyerString{}.Destroy(e.Url)
}