Update to risc0 0.21 (#38)

- Update risc0 to 0.21
- Harmonize crates naming, they all start with `risc0-ethereum`. This is
useful when automatising the patch on cross-repo CI.
- Update solidity verifier to risc0 0.21
- Move `bonsai-rest-api-mock` from `risc0`

Closes #39

.github/workflows/main.yml

@@ -17,8 +17,8 @@ permissions:
 
 env:
   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-  RISC0_TOOLCHAIN_VERSION: v2024-01-31.1
-  RISC0_CRATE_VERSION: "^0.20"
+  RISC0_TOOLCHAIN_VERSION: v2024-02-08.1
+  RISC0_CRATE_VERSION: "^0.21"
 
 jobs:
   # see: https://github.com/orgs/community/discussions/26822
@@ -44,7 +44,7 @@ jobs:
           # Full history is required by license-check.py
           fetch-depth: 0
           submodules: recursive
-      - uses: risc0/risc0/.github/actions/rustup@release-0.20
+      - uses: risc0/risc0/.github/actions/rustup@release-0.21
       - name: Install cargo-sort
         uses: risc0/cargo-install@b9307573043522ab0d3e3be64a51763b765b52a4
         with:
@@ -94,9 +94,9 @@ jobs:
         with:
           submodules: recursive
       - if: matrix.feature == 'cuda'
-        uses: risc0/risc0/.github/actions/cuda@release-0.20
-      - uses: risc0/risc0/.github/actions/rustup@release-0.20
-      - uses: risc0/risc0/.github/actions/sccache@release-0.20
+        uses: risc0/risc0/.github/actions/cuda@release-0.21
+      - uses: risc0/risc0/.github/actions/rustup@release-0.21
+      - uses: risc0/risc0/.github/actions/sccache@release-0.21
         with:
           key: ${{ matrix.os }}-${{ matrix.feature }}
       - run: cargo install --force --locked cargo-risczero@$RISC0_CRATE_VERSION -F $FEATURE
@@ -125,11 +125,11 @@ jobs:
       - uses: actions/checkout@v4
         with:
           submodules: recursive
-      - uses: risc0/risc0/.github/actions/rustup@release-0.20
+      - uses: risc0/risc0/.github/actions/rustup@release-0.21
       - uses: risc0/foundry-toolchain@2fe7e70b520f62368a0e3c464f997df07ede420f
         with:
           version: nightly-09fe3e041369a816365a020f715ad6f94dbce9f2
-      - uses: risc0/risc0/.github/actions/sccache@release-0.20
+      - uses: risc0/risc0/.github/actions/sccache@release-0.21
         with:
           key: macOS-default
       - run: cargo install --force --locked cargo-risczero@$RISC0_CRATE_VERSION