ci: build neard-sandbox corresponding release version (#950)

## Description

The motivation for adding this PR is the potentially incontinent
behaviour of the Aurora contract on-chain and in our tests, due to the
outdated version of the `neard-sandbox` that could be used in the
`near-workspaces`. The PR adds a script that builds an actual version of
the `neard-sandbox` for each network (mainnet and testnet) for use in
the scheduled tests in the Github CI. The PR fixes the
`test_exit_to_near_wnear*` tests that started failing after the
near-workspace was bumped to 0.12 (near-sandbox 2.1.1).

.github/workflows/scheduled_lints.yml

@@ -6,25 +6,25 @@ name: Scheduled checks
 jobs:
   tests:
     name: Run tests
-    runs-on: [self-hosted, heavy]
+    runs-on: [ self-hosted, heavy ]
+    strategy:
+      fail-fast: false
+      matrix:
+        profile: [ mainnet, testnet, mainnet-silo, testnet-silo ]
     steps:
       - name: Potential broken submodules fix
         run: |
           git checkout -f $(git -c user.name=x -c user.email=x@x commit-tree $(git hash-object -t tree /dev/null) < /dev/null) || :
       - name: Clone the repository
         uses: actions/checkout@v4
-      - name: Test mainnet
-        run: cargo make --profile mainnet test-flow
-      - name: Test testnet
-        run: cargo make --profile testnet test-flow
-      - name: Test mainnet silo
-        run: cargo make --profile mainnet-silo test-flow
-      - name: Test testnet silo
-        run: cargo make --profile testnet-silo test-flow
+      - name: Build actual neard-sandbox
+        run: scripts/build-neard-sandbox.sh ${{ matrix.profile }}
+      - name: Test ${{ matrix.profile }}
+        run: cargo make --profile ${{ matrix.profile }} test-flow
 
   checks:
     name: Run checks
-    runs-on: [self-hosted, heavy]
+    runs-on: [ self-hosted, heavy ]
     steps:
       - name: Potential broken submodules fix
         run: |