ci: remove serde_core/wasm32v1-none workarounds, re-enable 35+ disabled jobs

The serde_core + Rust 1.88 issue only affects wasm32v1-none target.
wasm32-unknown-unknown works fine, and wasm-builder falls back to it
automatically when wasm32v1-none is not installed.

- Remove all `rustup target add wasm32v1-none` steps (12 files)
- Remove SKIP_WASM_BUILD=1 env vars added as workaround (28 occurrences)
- Re-enable quick-benchmarks job (tests.yml)
- Re-enable check-core-crypto-features job (checks.yml)
- Re-enable 15 build/zombienet jobs (build-publish-images.yml)
- Re-enable test-pezframe-examples-compile-to-wasm and
  test-deterministic-wasm jobs (tests-misc.yml)

Tracking: #355, #357, #358
Upstream: https://github.com/serde-rs/serde/issues/3021 (still open)

.github/workflows/tests.yml

@@ -19,11 +19,9 @@ jobs:
     uses: ./.github/workflows/reusable-preflight.yml
 
   # This job runs all benchmarks defined in the `/bin/node/runtime` once to check that there are no errors.
-  # TEMPORARILY DISABLED: Requires WASM but serde_core + Rust 1.88 + wasm32 bug prevents WASM build
-  # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
   quick-benchmarks:
     needs: [preflight]
-    if: false  # Disabled until serde_core upstream fix
+    if: ${{ needs.preflight.outputs.changes_rust }}
     runs-on: ${{ needs.preflight.outputs.RUNNER }}
     timeout-minutes: 45
     container:
@@ -56,8 +54,6 @@ jobs:
     container:
       image: ${{ needs.preflight.outputs.IMAGE }}
     continue-on-error: true # this rarely triggers in practice
-    env:
-      SKIP_WASM_BUILD: 1
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
@@ -81,7 +77,6 @@ jobs:
     container:
       image: ${{ needs.preflight.outputs.IMAGE }}
     env:
-      SKIP_WASM_BUILD: 1
       CARGO_INCREMENTAL: 0
     steps:
       - name: Checkout