fix(l2): flamegraph and benchmark workflows (#3652)

**Motivation**

Install solc to `flamegraph-reth` job. Successful run
[here](https://github.com/lambdaclass/ethrex/actions/runs/16305540602/job/46050676065?pr=3652).
Closes None

Author: avilagaston9

.github/workflows/main_flamegraph_report.yaml

@@ -283,6 +283,12 @@ jobs:
         with:
           toolchain: ${{ env.RUST_RETH_VERSION }}
 
+      - name: Install solc
+        uses: pontem-network/get-solc@master
+        with:
+          version: v0.8.29
+          token: ${{ secrets.GITHUB_TOKEN || '' }}
+
       # We need a reth version that requires a rustc version <= 1.87.0
       - name: Checkout reth
         uses: actions/checkout@v4

.github/workflows/pr_perf_blocks_exec.yaml

@@ -33,6 +33,12 @@ jobs:
         if: ${{ steps.cache.outputs.cache-hit != 'true' }}
         uses: ./.github/actions/setup-rust
 
+      - name: Install solc
+        uses: pontem-network/get-solc@master
+        with:
+          version: v0.8.29
+          token: ${{ secrets.GITHUB_TOKEN || '' }}
+
       - name: Build binary
         if: ${{ steps.cache.outputs.cache-hit != 'true' }}
         run: |

.github/workflows/pr_perf_build_block_bench.yml

@@ -17,6 +17,12 @@ jobs:
       - name: Setup Rust Environment
         uses: ./.github/actions/setup-rust
 
+      - name: Install solc
+        uses: pontem-network/get-solc@master
+        with:
+          version: v0.8.29
+          token: ${{ secrets.GITHUB_TOKEN || '' }}
+
       - name: Benchmarks
         uses: boa-dev/criterion-compare-action@v3
         with: