feat: add benchmarks_entrypoint.py (#34495)

* feat: add `benchmarks_entrypoint.py`

Adding `benchmarks_entrypoint.py` file, which will be run from the
benchmarks CI.

This python script will list all python files from the `benchmark/`
folder and run the included `run_benchmark` function, allowing people to
add new benchmarks scripts.

* feat: add `MetricsRecorder`

* feat: update dashboard

* fix: add missing arguments to `MetricsRecorder`

* feat: update dash & add datasource + `default.yml`

* fix: move responsibility to create `MetricsRecorder` in bench script

* fix: update incorrect datasource UID

* fix: incorrect variable values

* debug: benchmark entrypoint script

* refactor: update log level

* fix: update broken import

* feat: add debug log in `MetricsRecorder`

* debug: set log level to debug

* fix: set connection `autocommit` to `True`

benchmark/default.yml

@@ -0,0 +1,10 @@
+apiVersion: 1
+
+providers:
+  - name: 'Transformers Benchmarks'
+    orgId: 1
+    type: file
+    updateIntervalSeconds: 10
+    allowUiUpdates: true
+    options:
+      path: /etc/grafana/dashboards