chore: support multi-org group sync with runtime configuration (#14578)

- Implement multi-org group sync
- Implement runtime configuration to change sync behavior
- Legacy group sync migrated to new package

coderd/coderdtest/uuids.go

@@ -0,0 +1,25 @@
+package coderdtest
+
+import "github.com/google/uuid"
+
+// DeterministicUUIDGenerator allows "naming" uuids for unit tests.
+// An example of where this is useful, is when a tabled test references
+// a UUID that is not yet known. An alternative to this would be to
+// hard code some UUID strings, but these strings are not human friendly.
+type DeterministicUUIDGenerator struct {
+	Named map[string]uuid.UUID
+}
+
+func NewDeterministicUUIDGenerator() *DeterministicUUIDGenerator {
+	return &DeterministicUUIDGenerator{
+		Named: make(map[string]uuid.UUID),
+	}
+}
+
+func (d *DeterministicUUIDGenerator) ID(name string) uuid.UUID {
+	if v, ok := d.Named[name]; ok {
+		return v
+	}
+	d.Named[name] = uuid.New()
+	return d.Named[name]
+}