upgrade to polkadot-v0.9.40 (#350)

* upgrade to polkadot-v0.9.40

* https://github.com/pendulum-chain/spacewalk/actions/runs/5076404970/jobs/9118542926?pr=350#step:9:1563 and remove extra comments of grandpa

* `Void`

* #350 (comment),
#350 (comment),
#350 (comment)

* fix broken test case `test_check_slot_position`

* extra cleanup

* clippy cleanup

* clippy cleanup

* clippy cleanup

Author: b-yap

.github/workflows/ci-dev.yml

@@ -31,6 +31,9 @@ jobs:
         run: |
           sudo rm -rf /usr/local/lib/android # will release about 10 GB if you don't need Android
           sudo rm -rf /usr/share/dotnet # will release about 20GB if you don't need .NET
+          sudo rm -rf /opt/ghc
+          sudo rm -rf /usr/local/share/boost
+          sudo rm -rf "$AGENT_TOOLSDIRECTORY"
       - uses: actions/checkout@v2
 
       - name: Install sccache (ubuntu-latest)

.github/workflows/ci-main.yml

@@ -24,6 +24,9 @@ jobs:
         run: |
           sudo rm -rf /usr/local/lib/android # will release about 10 GB if you don't need Android
           sudo rm -rf /usr/share/dotnet # will release about 20GB if you don't need .NET
+          sudo rm -rf /opt/ghc
+          sudo rm -rf /usr/local/share/boost
+          sudo rm -rf "$AGENT_TOOLSDIRECTORY"
       - uses: actions/checkout@v2
 
       - name: Install package (ubuntu-latest)