CI: Preserve sanitizer logs from test subdirectories

CTest may run tests from build subdirectories. That means sanitizer logs
can be written below Build instead of the workspace root.

Search Build recursively when printing sanitizer output, and include
matching logs in the LibWeb test artifact.

Keep sanitizer log_path values relative so they work on Windows.
Absolute paths with drive letters contain colons there. That conflicts
with the ASAN_OPTIONS separator.

.github/workflows/lagom-template.yml

@@ -221,7 +221,10 @@ jobs:
         uses: actions/upload-artifact@v7
         with:
           name: libweb-test-artifacts-${{ inputs.os_name }}-${{ inputs.arch }}-${{ inputs.build_preset }}-${{ inputs.toolchain }}-${{ inputs.clang_plugins }}
-          path: ${{ github.workspace }}/Build/Tests/LibWeb/test-web/test-dumps/
+          path: |
+            Build/Tests/LibWeb/test-web/test-dumps/
+            Build/**/asan.log.*
+            Build/**/ubsan.log.*
           retention-days: 0
           if-no-files-found: ignore
 
@@ -229,7 +232,7 @@ jobs:
         if: ${{ !cancelled() && inputs.os_name != 'Windows' && inputs.build_preset == 'Sanitizer' }}
         working-directory: ${{ github.workspace }}
         run: |
-          log_output=$(find . -maxdepth 1 \( -name 'asan.log.*' -o -name 'ubsan.log.*' \) -exec cat {} \; )
+          log_output=$(find Build \( -name 'asan.log.*' -o -name 'ubsan.log.*' \) -exec cat {} \; )
           if [ -z "$log_output" ]; then
             echo "No sanitizer issues found."
           else