release: unset SKIP_WASM_BUILD (#7074)

# Description

Seems like I added `SKIP_WASM_BUILD=1` 

 for arch64 binaries, which
results in various errors like:
https://github.com/paritytech/polkadot-sdk/issues/6966. This PR unsets
the variable.

Closes #6966.

## Integration

People who found workarounds as in #6966 can consume the fixed binaries
again.

## Review Notes

I introduced SKIP_WASM_BUILD=1 for some reason for aarch64 (probably to
speed up testing) and forgot to remove it. It slipped through and
interfered with `stable2412` release artifacts. Needs backporting to
`stable2412` and then rebuilding/overwriting the aarch64 artifacts.

---------

Signed-off-by: Iulian Barbu <iulian.barbu@parity.io>

.github/workflows/release-reusable-rc-buid.yml

@@ -149,7 +149,6 @@ jobs:
       AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
       AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
       AWS_DEFAULT_REGION: ${{ secrets.AWS_DEFAULT_REGION }}
-      SKIP_WASM_BUILD: 1
     steps:
       - name: Checkout sources
         uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0

prdoc/pr_7074.prdoc

+# Schema: Polkadot SDK PRDoc Schema (prdoc) v1.0.0
+# See doc at https://raw.githubusercontent.com/paritytech/polkadot-sdk/master/prdoc/schema_user.json
+
+title: Unset SKIP_WASM_BUILD=1 for aarch64 binaries release 
+
+doc:
+  - audience: [ Node Dev, Runtime Dev]
+    description:
+      Fix the release pipeline environment by unsetting SKIP_WASM_BUILD=1
+      so that aarch64 binaries are built so that they contain runtimes
+      accordingly.
+
+crates: [ ]