This uses the correct value for checking whether a job was scheduled
or not.

https://docs.gitlab.com/ee/ci/variables/predefined_variables.html#predefined-variables-reference

These validations and security scans are to prevent incompatible
changes from being merged, and to see if everything is still valid on
the main branch.

But on a scheduled pipeline, we aren't really using them, this
disables creating the jobs there.

This reverts commit 1790596f.

Accidentally pushed this to main

These validations and security scans are to prevent incompatible
changes from being merged, and to see if everything is still valid on
the main branch.

But on a scheduled pipeline, we aren't really using them, this
disables creating the jobs there.