fix: add SKIP_WASM_BUILD to all workflows affected by serde_core issue

Workflows updated:
- tests-evm.yml: differential-tests and evm-test-suite jobs
- tests-linux-stable-coverage.yml: test-linux-stable-coverage job
- tests-linux-stable-xp.yml: both test jobs (currently disabled but ready)
- tests-misc.yml: test-full-crypto-feature job

All changes include tracking comment for issue #358.
The serde_core + Rust 1.88 + wasm32 combination causes duplicate lang item
error. These jobs don't require WASM output, so skip it.

.github/workflows/tests-linux-stable-xp.yml

@@ -39,6 +39,9 @@ jobs:
       # Enable debug assertions since we are running optimized builds for testing
       # but still want to have debug assertions.
       RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
+      # Temporary: Skip WASM build due to serde_core + Rust 1.88 + WASM bug
+      # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
+      SKIP_WASM_BUILD: 1
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
@@ -70,6 +73,9 @@ jobs:
       # Enable debug assertions since we are running optimized builds for testing
       # but still want to have debug assertions.
       RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
+      # Temporary: Skip WASM build due to serde_core + Rust 1.88 + WASM bug
+      # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
+      SKIP_WASM_BUILD: 1
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0