Mute full cluster restart test recovery test

This test is failing because of an addition of a call to GET
/_cluster/health with the parameter wait_for_no_initializing_shards set
to true. As older versions of Elasticsearch do not understand this
parameter, this request fails and the test fails. This commit marks this
test as awaiting a fix.

Author: jasontedor

qa/full-cluster-restart/src/test/java/org/elasticsearch/upgrades/FullClusterRestartIT.java

@@ -699,6 +699,7 @@ public void testEmptyShard() throws IOException {
      * Tests recovery of an index with or without a translog and the
      * statistics we gather about that.
      */
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/29544")
     public void testRecovery() throws IOException {
         int count;
         boolean shouldHaveTranslog;