Set query tags in Snowflake based on config tags

[lewish]

Similar to BigQuery, you can tag queries for easier cost and performance analysis.

https://docs.snowflake.com/en/sql-reference/sql/alter-session.html

Using the tags from the config block, eg:

config {
  type: "table"
  tags: ["tag1"]
}

We can set the query tag for any query we run for better reporting.