fix: Add typing for specType field on spec method (#8256)

Co-authored-by: Jennifer Shehane <shehane.jennifer@gmail.com>

cli/types/cypress.d.ts

@@ -107,6 +107,14 @@ declare namespace Cypress {
     fromAutWindow: WindowPosition & { x: number, y: number }
   }
 
+  /**
+   * Spec type for the given test. "integration" is the default, but
+   * tests run using experimentalComponentTesting will be "component"
+   *
+   * @see https://on.cypress.io/experiments
+   */
+  type CypressSpecType = "integration" | "component"
+
   /**
    * Window type for Application Under Test(AUT)
    */
@@ -221,6 +229,7 @@ declare namespace Cypress {
     //  name: "config_passing_spec.coffee",
     //  relative: "cypress/integration/config_passing_spec.coffee",
     //  absolute: "/users/smith/projects/web/cypress/integration/config_passing_spec.coffee"
+    //  specType: "integration"
     // }
     ```
      */
@@ -229,6 +238,7 @@ declare namespace Cypress {
       relative: string // "cypress/integration/config_passing_spec.coffee" or "__all" if clicked all specs button
       absolute: string
       specFilter?: string // optional spec filter used by the user
+      specType?: CypressSpecType
     }
 
     /**