CI JWT token usage instrumentation with Snowplow

What does this MR do and why?

This MR adds Snowplow instrumentation to track the usage of id_tokens: (JWT token) in the CI pipeline. The goal is to get the count of users and Ultimate namespaces using the feature.

The instrumentation works by tracking the event when a pipeline Build job is created with id_tokens defined. This Snowplow metric is a mirror of the existing Service Ping RedisHLL metric implemented here. (Service Ping key_path: redis_hll_counters.ci_secrets_management.i_ci_secrets_management_id_tokens_build_created_monthly)

How to set up and validate locally

1. Configure your GDK to run Snowplow Micro.

2. Go to http://gdk.test:9091/micro/good to observe the events being tracked.

3. Go to your Project's CI/CD Editor and update the contents with:

job_with_id_tokens:
  id_tokens:
    ID_TOKEN_1:
      aud: https://gitlab.com

  script:
    - echo 'test'

4. Commit the changes and run the pipeline. Refresh http://gdk.test:9091/micro/good and observe that an event appears with se_ac value create_id_tokens.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #388837 (closed)