stabilize package ID relative to encode-decode format cycles

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

internal/presenter/poweruser/json_presenter_test.go

@@ -33,7 +33,6 @@ func TestJSONPresenter(t *testing.T) {
 	catalog := pkg.NewCatalog()
 
 	catalog.Add(pkg.Package{
-		ID:      "package-1-id",
 		Name:    "package-1",
 		Version: "1.0.1",
 		Locations: []source.Location{
@@ -57,7 +56,6 @@ func TestJSONPresenter(t *testing.T) {
 		},
 	})
 	catalog.Add(pkg.Package{
-		ID:      "package-2-id",
 		Name:    "package-2",
 		Version: "2.0.1",
 		Locations: []source.Location{

internal/presenter/poweruser/test-fixtures/snapshot/TestJSONPresenter.golden

@@ -72,7 +72,7 @@
  ],
  "artifacts": [
   {
-   "id": "package-1-id",
+   "id": "13280550215267739407",
    "name": "package-1",
    "version": "1.0.1",
    "type": "python",
@@ -102,7 +102,7 @@
    }
   },
   {
-   "id": "package-2-id",
+   "id": "7356949319602771519",
    "name": "package-2",
    "version": "2.0.1",
    "type": "deb",