Move prebuilds code to enterprise top-level package, refactor into agpl pointers

Signed-off-by: Danny Kopping <danny@coder.com>

coderd/prebuilds/api.go

@@ -0,0 +1,27 @@
+package prebuilds
+
+import (
+	"context"
+
+	"github.com/google/uuid"
+	"golang.org/x/xerrors"
+
+	"github.com/coder/coder/v2/coderd/database"
+)
+
+type Claimer interface {
+	Claim(ctx context.Context, store database.Store, userID uuid.UUID, name string, presetID uuid.UUID) (*uuid.UUID, error)
+	Initiator() uuid.UUID
+}
+
+type AGPLPrebuildClaimer struct{}
+
+func (c AGPLPrebuildClaimer) Claim(context.Context, database.Store, uuid.UUID, string, uuid.UUID) (*uuid.UUID, error) {
+	return nil, xerrors.Errorf("not entitled to claim prebuilds")
+}
+
+func (c AGPLPrebuildClaimer) Initiator() uuid.UUID {
+	return uuid.Nil
+}
+
+var DefaultClaimer Claimer = AGPLPrebuildClaimer{}