fix(try-it-out): reset of oas3 requestBody should use default values (#8265)

Co-authored-by: Mathias Spanhove <mathias.spanhove@katoennatie.com>

test/e2e-cypress/tests/bugs/8217.js

@@ -0,0 +1,24 @@
+describe("#8217: Reset Request Body not using default values", () => {
+  it("it reset the user edited value and executes with the default value in case of try out reset. (#6517)", () => {
+    cy
+      .visit("?url=/documents/bugs/8217.yaml")
+      .get("#operations-default-addPet")
+      .click()
+      // Expand Try It Out
+      .get(".try-out__btn")
+      .click()
+      // replace default sample with bad value
+      .get(`.parameters[data-property-name="bodyParameter"] input`)
+      .type("{selectall}not the default value")
+      // Reset Try It Out
+      .get(".try-out__btn.reset")
+      .click()
+      // Submit using default value
+      .get(".btn.execute")
+      .click()
+      // No required validation error on body parameter
+      .get(`.parameters[data-property-name="bodyParameter"] input`)
+      .should("have.value", "default")
+      .and("not.have.class", "invalid")
+  })
+})