ci: log CPU details when testing

When testing, there are certain CPU-dependent features that influence
Cranelift's codegen (e.g., availability of AVX512 instructions). This
additional CI step logs the current CPU information to aid in
troubleshooting, such as the MPK-related troubleshooting over in bytecodealliance#7445.
Also, if we let this run in CI for a while, we may be able to run
queries on the logs to determine how often jobs run on servers with
certain features enabled.

.github/workflows/main.yml

@@ -471,6 +471,10 @@ jobs:
       run: |
         diff -ru crates/wasi/wit crates/wasi-http/wit
 
+    # Record some CPU details; this is helpful information if tests fail due
+    # to CPU-specific features.
+    - run: lscpu
+
     # Build and test all features
     - run: ./ci/run-tests.sh --locked
       env: