Views incorrectly removed in CI

[Alexander]

See these two commits:
29a90e3
ac85038

The view.sql was made an empty file and the metadata.sql was deleted. The next commit re-added them.

See this commit as well:
f8d35f7
which did the same, and seems to be breaking the validate-views CI job: https://app.circleci.com/pipelines/github/mozilla/bigquery-etl/30667/workflows/0c39b729-1b29-4300-a819-a2c93301f994/jobs/330911 (until the view gets re-added in a subsequent commit).

I suspect there's some overwriting happening in the generate-sql CI job, with two operations that should be serialized.

┆Issue is synchronized with this Jira Task