chore: remove union membership proofs (#132)

* imp: removed union contracts and code

* deps: removed union from e2es

* imp: ran abi-gen

* imp: back to stable rust and removed unneeded fixtures and ci

* ci: simplified sp1 toolchain installation

* imp: remove broken linter

.github/workflows/e2e.yml

@@ -24,12 +24,12 @@ jobs:
     steps:
       - uses: actions/setup-go@v5
         with:
-          go-version: "1.22"
+          go-version: "1.23"
       - uses: actions/checkout@v4
       - name: golangci-lint
         uses: golangci/[email protected]
         with:
-          version: v1.60
+          version: v1.61
           args: --timeout 5m
           working-directory: e2e/interchaintestv8
   e2e:
@@ -42,7 +42,6 @@ jobs:
           - TestWithSP1ICS07TendermintTestSuite/TestDeploy_Plonk
           - TestWithSP1ICS07TendermintTestSuite/TestUpdateClient_Groth16
           - TestWithSP1ICS07TendermintTestSuite/TestUpdateClient_Plonk
-          - TestWithSP1ICS07TendermintTestSuite/TestMembership_Union
           - TestWithSP1ICS07TendermintTestSuite/TestMembership_Groth16
           - TestWithSP1ICS07TendermintTestSuite/TestMembership_Plonk
           - TestWithSP1ICS07TendermintTestSuite/TestUpdateClientAndMembership_Groth16
@@ -71,14 +70,9 @@ jobs:
           profile: minimal
           toolchain: stable
 
-      - name: Get SP1 version
-        id: sp1-version
-        run: |
-          sp1_version=$(cargo metadata --format-version 1 | jq -r '.packages[] | select(.name == "sp1-sdk") | .version')
-          echo "sp1_version=v$sp1_version" >> $GITHUB_OUTPUT
       - name: Install SP1 toolchain
         run: |
-          curl -L https://raw.githubusercontent.com/succinctlabs/sp1/${{ steps.sp1-version.outputs.sp1_version }}/sp1up/install | bash
+          curl -L https://sp1.succinct.xyz | bash
           ~/.sp1/bin/sp1up --token ${{ secrets.GITHUB_TOKEN }}
           ~/.sp1/bin/cargo-prove prove --version
       - name: Install just