test(client): happy blog-env test has no assertion

[Jolg42]

This test has no assertion. adding "expect.assertions(1)" at the beginning makes the test fail.

https://github.com/prisma/prisma/blob/main/packages/client/src/__tests__/integration/happy/blog-env/test.ts

On first look, it looks like it's trying to test PrismaClientInitializationError but the code never errors.

We should check and properly test PrismaClientInitializationError

Context https://prisma-company.slack.com/archives/C016KUHB1R6/p1616400507047100

[danstarns]

it is hard to tell what this test is testing, however, here I have added my best guess and ported the test to the new functional style #13657