fix(catalog): remove gap interceptor support (#244)

Gap interceptors were actually never used in CLD since the relevant
headers are injected in the proxy instead of at the code level. We can
remove the gap interceptors.

CLD has already removed the usage
[here](smartcontractkit/chainlink-deployments@95aefae)

Author: graham-chainlink

datastore/catalog/grpc.go

@@ -7,23 +7,16 @@ import (
 	"google.golang.org/grpc/credentials"
 
 	datastore "github.com/smartcontractkit/chainlink-deployments-framework/datastore/catalog/internal/protos"
-	cldf_grpc "github.com/smartcontractkit/chainlink-deployments-framework/internal/grpc"
 )
 
 type CatalogClient struct {
 	GRPC string
 	datastore.DeploymentsDatastoreClient
 }
 
-type GAPConfig struct {
-	Token      string
-	Repository string
-}
-
 type CatalogConfig struct {
 	GRPC  string
 	Creds credentials.TransportCredentials
-	GAP   *GAPConfig
 }
 
 // NewCatalogClient creates a new CatalogClient with the provided configuration.
@@ -49,12 +42,6 @@ func newCatalogConnection(cfg CatalogConfig) (*grpc.ClientConn, error) {
 		opts = append(opts, grpc.WithTransportCredentials(cfg.Creds))
 	}
 
-	if cfg.GAP != nil && cfg.GAP.Token != "" && cfg.GAP.Repository != "" {
-		interceptors = append(interceptors,
-			cldf_grpc.GapTokenInterceptor(cfg.GAP.Token),
-			cldf_grpc.GapRepositoryInterceptor(cfg.GAP.Repository))
-	}
-
 	if len(interceptors) > 0 {
 		opts = append(opts, grpc.WithChainUnaryInterceptor(interceptors...))
 	}

datastore/catalog/grpc_test.go

@@ -26,42 +26,6 @@ func TestNewCatalogClient_Success(t *testing.T) {
 			},
 			expectError: false,
 		},
-		{
-			name: "config_with_gap_token_only",
-			config: catalog.CatalogConfig{
-				GRPC:  "localhost:9090",
-				Creds: insecure.NewCredentials(),
-				GAP: &catalog.GAPConfig{
-					Token:      "test-token",
-					Repository: "",
-				},
-			},
-			expectError: false,
-		},
-		{
-			name: "config_with_gap_repository_only",
-			config: catalog.CatalogConfig{
-				GRPC:  "localhost:9090",
-				Creds: insecure.NewCredentials(),
-				GAP: &catalog.GAPConfig{
-					Token:      "",
-					Repository: "test-repo",
-				},
-			},
-			expectError: false,
-		},
-		{
-			name: "full_config",
-			config: catalog.CatalogConfig{
-				GRPC:  "localhost:9090",
-				Creds: insecure.NewCredentials(),
-				GAP: &catalog.GAPConfig{
-					Token:      "test-token",
-					Repository: "test-repo",
-				},
-			},
-			expectError: false,
-		},
 		{
 			name: "no_transport_credentials",
 			config: catalog.CatalogConfig{