test: retry tls tests

Author: durran

test/integration/client-side-encryption/client_side_encryption.prose.test.ts

@@ -1527,6 +1527,8 @@ describe('Client Side Encryption Prose Tests', metadata, function () {
       const masterKeyInvalidHostname = { ...masterKey, endpoint: '127.0.0.1:9001' };
 
       it('should fail with no TLS', metadata, async function () {
+        // NODE-6861: flakiness is caused by mock KMS servers
+        this.retries(2);
         try {
           await clientEncryptionNoTls.createDataKey('aws', { masterKey });
           expect.fail('it must fail with no tls');
@@ -1631,6 +1633,8 @@ describe('Client Side Encryption Prose Tests', metadata, function () {
       };
 
       it('should fail with no TLS', metadata, async function () {
+        // NODE-6861: flakiness is caused by mock KMS servers
+        this.retries(2);
         try {
           await clientEncryptionNoTls.createDataKey('gcp', { masterKey });
           expect.fail('it must fail with no tls');