linera-web: remove TRACE logs (#4928)

## Motivation

@ma2bd has observed a significant slowdown on the Web with `TRACE` logs
enabled.

## Proposal

Compile them out.

## Test Plan

Unclear.  Manual?

## Release Plan

- These changes should be backported to the latest `testnet` branch,
then
    - be released in a new SDK,

## Links

- [reviewer
checklist](https://github.com/linera-io/linera-protocol/blob/main/CONTRIBUTING.md#reviewer-checklist)

Signed-off-by: James Kay <[email protected]>

Author: Twey

linera-web/Cargo.toml

@@ -23,7 +23,7 @@ num-traits.workspace = true
 serde.workspace = true
 serde-wasm-bindgen.workspace = true
 tokio-util.workspace = true
-tracing.workspace = true
+tracing = { workspace = true, features = ["release_max_level_debug"] }
 wasm-bindgen.workspace = true
 wasm-bindgen-futures.workspace = true