feat: Optionally ignore unused track parameters

[lhearachel]

This makes it possible to ignore totally-unused track parameters, rather than always failing with an error when a track parameter is given but not used. This is, at minimum, a developer-experience improvement while building new tracks.

Sample Output

> esrally race --track=geonames --track-params="nonexistent_param:foo"

    ____        ____
   / __ \____ _/ / /_  __
  / /_/ / __ `/ / / / / /
 / _, _/ /_/ / / / /_/ /
/_/ |_|\__,_/_/_/\__, /
                /____/

[INFO] Race id is [66377ae1-42ab-4bf8-8c33-a3b8f215f3c0]
[ERROR] Some of your track parameter(s) "nonexistent_param" are not used by this track; perhaps you intend to use  instead.

All track parameters you provided are:
- nonexistent_param

All parameters exposed by this track:
- bulk_indexing_clients
- bulk_size
- cluster_health
- conflict_probability
- conflicts
- error_level
- include_force_merge
- include_non_serverless_index_settings
- include_target_throughput
- index_settings
- ingest_percentage
- max_num_segments
- number_of_replicas
- number_of_shards
- on_conflict
- post_ingest_sleep
- post_ingest_sleep_duration
- recency
- source_enabled
- store_type
[ERROR] Cannot race. Traceback (most recent call last):
  =~ snipped for brevity ~=

> esrally race --track=geonames --track-params="nonexistent_param:foo" --ignore-unused-track-params

    ____        ____
   / __ \____ _/ / /_  __
  / /_/ / __ `/ / / / / /
 / _, _/ /_/ / / / /_/ /
/_/ |_|\__,_/_/_/\__, /
                /____/

[INFO] Race id is [aef4d33b-b525-4e9a-886d-e9e16e443214]
[WARNING] Some of your track parameter(s) "nonexistent_param" are not used by this track; perhaps you intend to use  instead.

All track parameters you provided are:
- nonexistent_param

All parameters exposed by this track:
- bulk_indexing_clients
- bulk_size
- cluster_health
- conflict_probability
- conflicts
- error_level
- include_force_merge
- include_non_serverless_index_settings
- include_target_throughput
- index_settings
- ingest_percentage
- max_num_segments
- number_of_replicas
- number_of_shards
- on_conflict
- post_ingest_sleep
- post_ingest_sleep_duration
- recency
- source_enabled
- store_type
[INFO] Preparing for race ..
  =~ snipped for brevity ~=

Testing

I get the following error when I run make check-all locally:

self = <it.TestCluster object at 0x107ad5160>, distribution_version = '8.5.1'
node_name = 'metrics-store', car = 'defaults,basic-license', http_port = 10200

    def install(self, distribution_version, node_name, car, http_port):
        self.http_port = http_port
        transport_port = http_port + 100
        try:
            output = process.run_subprocess_with_output(
                "esrally install --configuration-name={cfg} --quiet --distribution-version={dist}--build-type=tar "
                "--http-port={http_port} --node={node_name} --master-nodes={node_name} --car={car} "
                '--seed-hosts="127.0.0.1:{transport_port}" --cluster-name={cfg}'.format(
                    cfg=self.cfg,
                    dist=distribution_version,
                    http_port=http_port,
                    node_name=node_name,
                    car=car,
                    transport_port=transport_port,
                )
            )
            self.installation_id = json.loads("".join(output))["installation-id"]
        except BaseException as e:
>           raise AssertionError(f"Failed to install Elasticsearch {distribution_version}.", e)
E           AssertionError: ('Failed to install Elasticsearch 8.5.1.', JSONDecodeError('Expectingvalue: line 1 column 2 (char 1)'))

it/__init__.py:161: AssertionError