chore(enos): Always destroy enos infrastructure (#3000)

When the `Run Enos scenario` and `Retry Enos scenario` steps fail, the Destroy command does not get run since the `Retry` step marks the workflow as failed. This leaves some infrastructure hanging around.

.github/workflows/enos-run.yml

@@ -170,6 +170,7 @@ jobs:
           export ENOS_VAR_enos_user=$GITHUB_ACTOR && \
           enos scenario run --timeout 60m0s --chdir ./enos ${{ matrix.filter }}
       - name: Destroy Enos scenario
+        if: ${{ always() }}
         env:
           ENOS_VAR_aws_region: us-east-1
           ENOS_VAR_aws_ssh_keypair_name: ${{ github.event.repository.name }}-ci-ssh-key