feat!: don't load `env()` for `url` in `get_config` (#5681)
Don't load or validate the `url` attribute from the `datasource` block
in `get_config`.
It isn't fully removed yet, but it is now essentially ignored everywhere
except Query Engine.
Ref: https://github.com/prisma/prisma/pull/28298
Ref:
https://linear.app/prisma-company/issue/TML-1459/remove-processenv-loading-from-prismaclient
Ref:
https://linear.app/prisma-company/issue/TML-1545/remove-url-datasource-attribute-from-psl
/prisma-branch push-svxonmzrnypx