feat: add coderd_group resource

[ethanndickson]

Plus some acceptance test clean up.

[ethanndickson]

• fix: support non-enterprise template resources #47
• chore: add template resource trace logging #44
• chore: add uuid terraform type #43
• feat: add coderd_template resource #35
• chore: add groups to integration test #34
• feat: add coderd_organization data source #33
• feat: add coderd_group data source #32
• feat: add coderd_group resource #31 👈
• main

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[deansheather]

Looks good but you should also wait for Colin's review

[deansheather]

For groups (and eventually orgs), we probably should add some settings:

• some property like unmanaged_members = true to avoid management of users (aka. only update the org properties not members)
• some property like no_remove_members = true to avoid removing missing members

[ethanndickson]

Terraform doesn't allow providers to modify configured values. For a user to set unmanaged_members to true, they would also need to set members to null or an empty list (we'll go with null). We can reasonably implement this, but I don't think we need the field for it, setting members to null can just make members not be managed.

For the same reason, implementing a no_remove_members would be messy, as it would require us to store some hidden state separate from the configurable members keeping track of all members that the resource has seen throughout it's lifetime. Is this worth it?