.github: collect all the OTEL traces

Jaeger does not make it easy to dump all the collected trace spans from
all services at once. Switch to using the OpenTelemetry Collector with
the OTLP File exporter which writes the traces straight to disk in a
format that Jaeger UI can natively consume.

Signed-off-by: Cory Snider <csnider@mirantis.com>

.github/workflows/arm64.yml

@@ -226,13 +226,14 @@ jobs:
         name: Prepare reports
         if: always()
         run: |
+          docker stop otelcol
           reportsPath="/tmp/reports/arm64-graphdriver"
           mkdir -p bundles $reportsPath
           find bundles -path '*/root/*overlay2' -prune -o -type f \( -name '*-report.json' -o -name '*.log' -o -name '*.out' -o -name '*.prof' -o -name '*-report.xml' \) -print | xargs sudo tar -czf /tmp/reports.tar.gz
           tar -xzf /tmp/reports.tar.gz -C $reportsPath
+          mv /tmp/reports/otel-trace*.jsonl $reportsPath/
           sudo chown -R $(id -u):$(id -g) $reportsPath
           tree -nh $reportsPath
-          curl -sSLf localhost:16686/api/traces?service=integration-test-client > $reportsPath/jaeger-trace.json
       -
         name: Send to Codecov
         uses: codecov/codecov-action@v4