refactor: Drop pointers from remaining ProjectV2View required fields

Per the OpenAPI schema, creator, created_at, updated_at, visible_fields,
sort_by, group_by and vertical_group_by are required on the project view
response, so they should be non-pointer values without omitempty (matching
the convention that only optional fields are pointers). The scalar fields
were already converted; this does the same for the object, timestamp and
slice fields. Filter stays a pointer as it is optional.

Accessors are regenerated accordingly.

Author: JamBalaya56562

github/github-accessors.go

@@ -885,14 +885,14 @@ type ProjectV2View struct {
 	NodeID          string                 `json:"node_id"`
 	ProjectURL      string                 `json:"project_url"`
 	HTMLURL         string                 `json:"html_url"`
-	Creator         *User                  `json:"creator,omitempty"`
+	Creator         User                   `json:"creator"`
 	Filter          *string                `json:"filter,omitempty"`
-	VisibleFields   []int64                `json:"visible_fields,omitempty"`
-	SortBy          []*ProjectV2ViewSortBy `json:"sort_by,omitempty"`
-	GroupBy         []int64                `json:"group_by,omitempty"`
-	VerticalGroupBy []int64                `json:"vertical_group_by,omitempty"`
-	CreatedAt       *Timestamp             `json:"created_at,omitempty"`
-	UpdatedAt       *Timestamp             `json:"updated_at,omitempty"`
+	VisibleFields   []int64                `json:"visible_fields"`
+	SortBy          []*ProjectV2ViewSortBy `json:"sort_by"`
+	GroupBy         []int64                `json:"group_by"`
+	VerticalGroupBy []int64                `json:"vertical_group_by"`
+	CreatedAt       Timestamp              `json:"created_at"`
+	UpdatedAt       Timestamp              `json:"updated_at"`
 }
 
 // ProjectV2ViewSortBy represents a single sort criterion of a project view.