Add script to migrate InfluxDB e2e test data to GCS in json format

What does this MR do and why?

Closes gitlab-org/quality/quality-engineering/team-tasks#2703 (closed)

This MR:

1. Converts MigrateInfluxDataToGcs to a super class and moves CSV specific functionality to MigrateInfluxDataToGcsCsv
2. Adds MigrateInfluxDataToGcsJson that creates json objects and uploads to a GCP bucket.

Please note that there are no code changes in MigrateInfluxDataToGcsCsv. It has the same code moved over from MigrateInfluxDataToGcs.

• An example run of bundle exec rake "influx_to_gcs_json[2024, 1]": https://gitlab.com/gitlab-org/quality/toolbox/-/jobs/6902606810
• The bucket where the files were uploaded: https://console.cloud.google.com/storage/browser/e2e_test_metrics_json;tab=objects?forceOnBucketsSortingFiltering=true&authuser=1&project=gitlab-qa-resources&prefix=&forceOnObjectsSortingFiltering=false

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Before	After

How to set up and validate locally

1. Download and save the json file in 1P attached to a note titled "influx-to-gcs GCS service account in gitlab-qa-resources". The path to the saved file should be provided in QA_METRICS_GCS_CREDS in the below command.

2. From the qa folder, run:

QA_INFLUXDB_TIMEOUT=300 QA_METRICS_GCS_PROJECT_ID="gitlab-qa-resources" QA_METRICS_GCS_CREDS="/path/to/json/key/file.json" QA_METRICS_GCS_BUCKET_NAME="e2e_test_metrics_json" QA_INFLUXDB_TOKEN="<QA_INFLUXDB_TOKEN_FROM_1P>" QA_INFLUXDB_URL="https://influxdb.quality.gitlab.net" bundle exec rake "influx_to_gcs_json[2024, 1, 1]"