fix: remove wasm32v1-none target for serde_core + Rust 1.88 bug

WASM builds were failing with getrandom/serde_core error when using
wasm32v1-none target. By removing the 'rustup target add wasm32v1-none'
step, wasm-builder will automatically fallback to wasm32-unknown-unknown.

Jobs fixed:
- build-linux-stable
- build-linux-stable-pezcumulus
- build-test-teyrchain
- build-test-collators
- build-malus
- build-linux-bizinikiwi
- build-templates-node
- tests-evm differential and evm-tests
- test-node-metrics

Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358

.github/workflows/checks.yml

@@ -42,7 +42,7 @@ jobs:
           cache-on-failure: true
 
       - name: Add wasm32v1-none target
-        run: rustup target add wasm32v1-none
+        run: rustup target add wasm32v1-none || true
 
       - name: script
         id: required