ci: run clean step even on failed runs

Add `if: always()` to the clean steps so workspace artifacts are
trimmed before cache upload even when a prior step fails.

https://claude.ai/code/session_014NgdhJMEQSguQ8yXAuTfnq

Author: claude

.github/workflows/benchmark.yaml

@@ -117,6 +117,7 @@ jobs:
         run: node ci/github-actions/check-for-performance-regressions.js
 
       - name: Clean workspace artifacts before cache
+        if: always()
         continue-on-error: true
         shell: bash
         run: cargo clean --workspace

.github/workflows/clippy.yaml

@@ -60,6 +60,7 @@ jobs:
         run: ./test.sh
 
       - name: Clean workspace artifacts before cache
+        if: always()
         continue-on-error: true
         shell: bash
         run: cargo clean --workspace

.github/workflows/deploy.yaml

@@ -618,6 +618,7 @@ jobs:
           asset_content_type: application/x-compressed-tar
 
       - name: Clean workspace artifacts before cache
+        if: always()
         continue-on-error: true
         shell: bash
         run: cargo clean --workspace

.github/workflows/test.yaml

@@ -75,6 +75,7 @@ jobs:
         run: ./test.sh --release
 
       - name: Clean workspace artifacts before cache
+        if: always()
         continue-on-error: true
         shell: bash
         run: cargo clean --workspace