Replace getQRCodeBytes with generateQRCode (#11241)

* Replace `getQRCodeBytes` with `generateQRCode`

* another test update

* remove obsolete snapshot

test/components/views/right_panel/UserInfo-test.tsx

@@ -179,6 +179,7 @@ describe("<UserInfo />", () => {
             Object.assign(this, {
                 channel: { transactionId: 1 },
                 otherPartySupportsMethod: jest.fn(),
+                generateQRCode: jest.fn().mockReturnValue(new Promise(() => {})),
                 ...opts,
             });
         }