Re-enable Cypress test creating a DM on Rust (#11946)

Full name of the test: 'Cryptography > creating a DM should work, being e2e-encrypted / user verification'

I ran this 20 times with rust crypto locally and it seemed to pass, so
giving it a go on CI.

cypress/e2e/crypto/crypto.spec.ts

@@ -256,7 +256,6 @@ describe("Cryptography", function () {
     }
 
     it("creating a DM should work, being e2e-encrypted / user verification", function (this: CryptoTestContext) {
-        skipIfRustCrypto(); // https://github.com/vector-im/element-web/issues/25618
         cy.bootstrapCrossSigning(aliceCredentials);
         startDMWithBob.call(this);
         // send first message