chore: refactor the web UI tests for the actions run

- create tests/integration/actions_view_test.go
- extract TestActionsArtifactDeletion from actions_route_test.go
- extract tests misplaced in
  - api_actions_artifact_test.go
  - api_actions_artifact_v4_test.go
- add a tests for the /{owner}/{repo}/actions/runs/{run_index}/artifacts
  because it is useful for debugging

tests/integration/actions_route_test.go

@@ -146,38 +146,3 @@ func TestActionsWebRouteLatestRun(t *testing.T) {
 		assert.Equal(t, workflow.HTMLURL(), resp.Header().Get("Location"))
 	})
 }
-
-func TestActionsWebRouteArtifactDeletion(t *testing.T) {
-	onGiteaRun(t, func(t *testing.T, u *url.URL) {
-		user2 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
-
-		// create the repo
-		repo, _, f := tests.CreateDeclarativeRepo(t, user2, "",
-			[]unit_model.Type{unit_model.TypeActions}, nil,
-			[]*files_service.ChangeRepoFile{
-				{
-					Operation:     "create",
-					TreePath:      ".gitea/workflows/pr.yml",
-					ContentReader: strings.NewReader("name: test\non:\n  push:\njobs:\n  test:\n    runs-on: ubuntu-latest\n    steps:\n      - run: echo helloworld\n"),
-				},
-			},
-		)
-		defer f()
-
-		// a run has been created
-		assert.Equal(t, 1, unittest.GetCount(t, &actions_model.ActionRun{RepoID: repo.ID}))
-
-		// Load the run we just created
-		run := unittest.AssertExistsAndLoadBean(t, &actions_model.ActionRun{RepoID: repo.ID})
-		err := run.LoadAttributes(t.Context())
-		require.NoError(t, err)
-
-		// Visit it's web view
-		req := NewRequest(t, "GET", run.HTMLURL())
-		resp := MakeRequest(t, req, http.StatusOK)
-		htmlDoc := NewHTMLParser(t, resp.Body)
-
-		// Assert that the artifact deletion markup exists
-		htmlDoc.AssertElement(t, "[data-locale-confirm-delete-artifact]", true)
-	})
-}