ci: install wasm32v1-none target globally, migrate wasm-check to wasm32v1-none

wasm32-unknown-unknown with build-std=core,alloc on Rust >=1.88 now ships
a pre-built std in the sysroot, causing E0152 duplicate core lang items when
serde_core is compiled. Switching to wasm32v1-none (target_os=none, no sysroot
std) eliminates the conflict. Also fixes wasm-check getrandom compile_error
which only triggers on wasm*-unknown-unknown, not wasm32v1-none.

.gitlab-ci.yml

@@ -44,6 +44,7 @@ default:
   before_script:
     - rustup show
     - rustc --version && cargo --version
+    - rustup target add wasm32v1-none
   cache:
     key:
       files:
@@ -341,8 +342,7 @@ wasm-check:
   stage: test
   needs: [check-try-runtime]
   script:
-    - rustup target add wasm32-unknown-unknown
-    - cargo check -p pezkuwichain-runtime --locked --target wasm32-unknown-unknown
+    - cargo check -p pezkuwichain-runtime --locked --target wasm32v1-none
   rules:
     - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
     - if: $CI_MERGE_REQUEST_IID