feat: add mutualTLS auth option (#9193)

Refs #8020 

Co-authored-by: Vladimír Gorej <vladimir.gorej@smartbear.com>

test/e2e-cypress/e2e/features/oas31-auth-mutual-tls.cy.js

@@ -0,0 +1,30 @@
+describe("MutualTLS Authorization", () => {
+
+  it("should open authorization popup", () => {
+    cy.visit(
+      "/?url=/documents/security/mutual-tls.yaml"
+    )
+      .get("button.authorize")
+      .click()
+      .get(".auth-container h4")
+      .contains("mutual (mutualTLS)")
+  })
+  it("should have description given by user", () => {
+    cy.visit(
+      "/?url=/documents/security/mutual-tls.yaml"
+    )
+      .get("button.authorize")
+      .click()
+      .get(".auth-container p:nth-of-type(2)")
+      .contains("Mutual TLS description")
+  })
+   it("should not display Authorize or Logout buttons", () => {
+    cy.visit(
+      "/?url=/documents/security/mutual-tls.yaml"
+    )
+      .get("button.authorize")
+      .click()
+      .get(".auth-button-wrapper")
+      .should("not.exist")
+  })
+})

test/e2e-cypress/static/documents/security/mutual-tls.yaml

@@ -0,0 +1,10 @@
+openapi: 3.1.0
+info:
+  title: Test Mutual TLS authorization
+  version: 1.0.0
+components:
+  securitySchemes:
+    mutual:
+      type: mutualTLS
+      description: Mutual TLS description
+      name: mutual