* Updated testingWithOwnerUser ruleguard rule to detect:
a) Passing client from coderdenttest.New() to clitest.SetupConfig() similar to what already exists for AGPL code
b) Usage of any method of the owner client from coderdenttest.New() - all usages of the owner client must be justified with a `//nolint:gocritic` comment.
* Fixed resulting linter complaints.
* Added new coderdtest helpers CreateGroup and UpdateTemplateMeta.
* Modified check_enterprise_import.sh to ignore scripts/rules.go.
