fix(l2): use GITHUB_TOKEN for sp1up and rzup actions (#3655)

**Motivation**

The SP1 toolchain fails sometimes to install with a generic "Failed to
fetch releases list" error, but the cause may be an [API rate
limit](succinctlabs/sp1#2320 (comment))

The Risc0 toolchain has the same problem, explicitly returning an API
rate limit error.

We bypass this by authenticating using the `GITHUB_TOKEN`

Author: xqft

.github/workflows/main_prover.yaml

@@ -27,6 +27,8 @@ jobs:
 
       - name: RISC-V SP1 toolchain install
         # if: ${{ always() && github.event_name == 'merge_group' }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           . "$HOME/.cargo/env"
           curl -L https://sp1.succinct.xyz | bash
@@ -92,4 +94,4 @@ jobs:
 
       - name: Ensure admin permissions in _work
         if: always()
-        run: sudo chown admin:admin -R /home/admin/actions-runner/_work/
+        run: sudo chown admin:admin -R /home/admin/actions-runner/_work/

.github/workflows/main_prover_l1.yaml

@@ -32,13 +32,17 @@ jobs:
 
       - name: RISC-V Risc0 toolchain install
         if: matrix.backend == 'risc0'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         # should be able to specify a version for `rzup install rust` (toolchain version)
         # but it throws a "error decoding response body" in that case
         run: |
           curl -L https://risczero.com/install | bash
           ~/.risc0/bin/rzup install cargo-risczero 2.1.0
           ~/.risc0/bin/rzup install rust
       - name: RISC-V SP1 toolchain install
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         if: matrix.backend == 'sp1'
         run: |
           curl -L https://sp1.succinct.xyz | bash

.github/workflows/pr-main_l2_prover.yaml

@@ -35,6 +35,8 @@ jobs:
 
       - name: RISC-V Risc0 toolchain install
         if: matrix.backend == 'risc0'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         # should be able to specify a version for `rzup install rust` (toolchain version)
         # but it throws a "error decoding response body" in that case
         run: |
@@ -44,6 +46,8 @@ jobs:
 
       - name: RISC-V SP1 toolchain install
         if: matrix.backend == 'sp1'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           curl -L https://sp1.succinct.xyz | bash
           ~/.sp1/bin/sp1up --version 5.0.0