Note: this commit was partially authored by AI.

• Replaces coderdtest.CreateTemplate/TemplateVersion() with direct dbgen calls. We do not need a fully functional template for these tests.
• Removes provisioner daemon creation/cleanup. We do not need a running provisioner daemon here; this functionality is tested elsewhere.
• Simplifies provisioner job creation test helpers.

This reduces the test runtime by over 50%:

Old:

time go test -count=100 ./cli -test.run=TestProvisionerJobsok      github.com/coder/coder/v2/cli   50.149s

New:

time go test -count=100 ./cli -test.run=TestProvisionerJobsok      github.com/coder/coder/v2/cli   21.898