ci: set up x/acounts/multisig (#20934)

Co-authored-by: Julien Robert <julien@rbrt.fr>

.github/workflows/test.yml

@@ -854,6 +854,29 @@ jobs:
           cd x/accounts/defaults/lockup
           go test -mod=readonly -timeout 30m -coverprofile=coverage.out -covermode=atomic -tags='norace ledger test_ledger_mock' ./...
 
+  test-x-accounts-multisig:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.22"
+          check-latest: true
+          cache: true
+          cache-dependency-path: x/accounts/multisig/lockup/go.sum
+      - uses: technote-space/get-diff-action@v6.1.2
+        id: git_diff
+        with:
+          PATTERNS: |
+            x/accounts/defaults/multisig/**/*.go
+            x/accounts/defaults/multisig/go.mod
+            x/accounts/defaults/multisig/go.sum
+      - name: tests
+        if: env.GIT_DIFF
+        run: |
+          cd x/accounts/defaults/multisig
+          go test -mod=readonly -timeout 30m -coverprofile=coverage.out -covermode=atomic -tags='norace ledger test_ledger_mock' ./...
+
   test-x-tx:
     runs-on: ubuntu-latest
     steps: