Tracing with tracy on iOS / Android

## What problem does this solve or what need does it fill?

Currently tracing using tracy can only be done on desktop because it is intentionally gated out on mobile platforms.

## What solution would you like?

I would like the log plugin to support the trace-tracy feature for iOS and Android,
given that the tracing_tracy crate can be built successfully for this platforms.

## What alternative(s) have you considered?

Forking bevy and changing one line to add the tracy layer (what I did currently to profile the Android version)

## Additional context

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Locate the log plugin's platform gating for the trace-tracy feature and inspect how the tracing_tracy crate is configured for iOS and Android. Build the relevant mobile targets and verify that tracing works on both platforms without requiring a fork.

Written by the indexing model from the issue text.