Migrate g_analytics_valuestream metric to Snowplow

What does this MR do and why?

Closes https://gitlab.com/gitlab-org/product-intelligence/-/issues/498

related to https://gitlab.com/gitlab-org/product-intelligence/-/issues/493

The first metric for migration RedisHLL metrics to Snowplow is g_analytics_valuestream as its straight forward and dont requite any additional logic, the event can be routed to snowplow as is. _

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Related to #498