Fix expected bytes in tests due to new major version

In 6.x we had to serialize the 2 byte marker for the transport address type
for BWC. Now in 6.x this doesn't exist and we write 2 bytes less when we serialize
a transport address to a min compat node.

Closes elastic#25893

test/framework/src/main/java/org/elasticsearch/transport/AbstractSimpleTransportTestCase.java

@@ -2422,7 +2422,7 @@ public String executor() {
             int addressLen = serviceB.boundAddress().publishAddress().address().getAddress().getAddress().length;
             // if we are bound to a IPv6 address the response address is serialized with the exception so it will be different depending
             // on the stack. The emphemeral port will always be in the same range
-            assertEquals(185 + addressLen, stats.getRxSize().getBytes());
+            assertEquals(183 + addressLen, stats.getRxSize().getBytes());
             assertEquals(91, stats.getTxSize().getBytes());
         } finally {
             serviceC.close();

test/framework/src/test/java/org/elasticsearch/transport/MockTcpTransportTests.java

@@ -53,10 +53,4 @@ protected Version executeHandshake(DiscoveryNode node, MockChannel mockChannel,
         mockTransportService.start();
         return mockTransportService;
     }
-
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/25893")
-    @Override
-    public void testTransportStatsWithException() throws Exception {
-        super.testTransportStatsWithException();
-    }
 }

test/framework/src/test/java/org/elasticsearch/transport/nio/SimpleNioTransportTests.java

@@ -130,10 +130,4 @@ public void testBindUnavailableAddress() {
         });
         assertEquals("Failed to bind to ["+ port + "]", bindTransportException.getMessage());
     }
-
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/25893")
-    @Override
-    public void testTransportStatsWithException() throws Exception {
-        super.testTransportStatsWithException();
-    }
 }