Fix and unmute synonyms tests

muted-tests.yml

@@ -185,9 +185,6 @@ tests:
 - class: org.elasticsearch.xpack.test.rest.XPackRestIT
   method: test {p0=snapshot/20_operator_privileges_disabled/Operator only settings can be set and restored by non-operator user when operator privileges is disabled}
   issue: https://github.com/elastic/elasticsearch/issues/116775
-- class: org.elasticsearch.backwards.MixedClusterClientYamlTestSuiteIT
-  method: test {p0=synonyms/90_synonyms_reloading_for_synset/Reload analyzers for specific synonym set}
-  issue: https://github.com/elastic/elasticsearch/issues/116777
 - class: org.elasticsearch.xpack.searchablesnapshots.hdfs.SecureHdfsSearchableSnapshotsIT
   issue: https://github.com/elastic/elasticsearch/issues/116851
 - class: org.elasticsearch.search.basic.SearchWithRandomIOExceptionsIT

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/synonyms/10_synonyms_put.yml

@@ -17,7 +17,10 @@ setup:
 
   - do:
       cluster.health:
-        wait_for_no_initializing_shards: true
+        index: .synonyms-2
+        timeout: 2s
+        wait_for_status: green
+        ignore: 408
 
   - do:
       synonyms.get_synonym:
@@ -64,7 +67,10 @@ setup:
 
   - do:
       cluster.health:
-        wait_for_no_initializing_shards: true
+        index: .synonyms-2
+        timeout: 2s
+        wait_for_status: green
+        ignore: 408
 
   - do:
       synonyms.get_synonym:

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/synonyms/110_synonyms_invalid.yml

@@ -14,7 +14,10 @@ setup:
   # This is to ensure that all index shards (write and read) are available. In serverless this can take some time.
   - do:
       cluster.health:
-        wait_for_no_initializing_shards: true
+        index: .synonyms-2
+        timeout: 2s
+        wait_for_status: green
+        ignore: 408
 
   - do:
       indices.create:

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/synonyms/20_synonyms_get.yml

@@ -17,7 +17,10 @@ setup:
   # This is to ensure that all index shards (write and read) are available. In serverless this can take some time.
   - do:
       cluster.health:
-        wait_for_no_initializing_shards: true
+        index: .synonyms-2
+        timeout: 2s
+        wait_for_status: green
+        ignore: 408
 
 ---
 "Get synonyms set":

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/synonyms/30_synonyms_delete.yml

@@ -15,7 +15,11 @@ setup:
   # This is to ensure that all index shards (write and read) are available. In serverless this can take some time.
   - do:
       cluster.health:
-        wait_for_no_initializing_shards: true
+        index: .synonyms-2
+        timeout: 2s
+        wait_for_status: green
+        ignore: 408
+
 ---
 "Delete synonyms set":
   - do:

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/synonyms/40_synonyms_sets_get.yml

@@ -13,7 +13,10 @@ setup:
   # This is to ensure that all index shards (write and read) are available. In serverless this can take some time.
   - do:
       cluster.health:
-        wait_for_no_initializing_shards: true
+        index: .synonyms-2
+        timeout: 2s
+        wait_for_status: green
+        ignore: 408
 
   - do:
       synonyms.put_synonym:

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/synonyms/50_synonym_rule_put.yml

@@ -17,7 +17,11 @@ setup:
   # This is to ensure that all index shards (write and read) are available. In serverless this can take some time.
   - do:
       cluster.health:
-        wait_for_no_initializing_shards: true
+        index: .synonyms-2
+        timeout: 2s
+        wait_for_status: green
+        ignore: 408
+
 ---
 "Update a synonyms rule":
   - do:

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/synonyms/60_synonym_rule_get.yml

@@ -17,8 +17,10 @@ setup:
   # This is to ensure that all index shards (write and read) are available. In serverless this can take some time.
   - do:
       cluster.health:
-        wait_for_no_initializing_shards: true
-
+        index: .synonyms-2
+        timeout: 2s
+        wait_for_status: green
+        ignore: 408
 
 ---
 "Get a synonym rule":

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/synonyms/70_synonym_rule_delete.yml

@@ -17,7 +17,10 @@ setup:
   # This is to ensure that all index shards (write and read) are available. In serverless this can take some time.
   - do:
       cluster.health:
-        wait_for_no_initializing_shards: true
+        index: .synonyms-2
+        timeout: 2s
+        wait_for_status: green
+        ignore: 408
 
 ---
 "Delete synonym rule":

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/synonyms/80_synonyms_from_index.yml

@@ -16,7 +16,10 @@ setup:
   # This is to ensure that all index shards (write and read) are available. In serverless this can take some time.
   - do:
       cluster.health:
-        wait_for_no_initializing_shards: true
+        index: .synonyms-2
+        timeout: 2s
+        wait_for_status: green
+        ignore: 408
 
   # Create an index with synonym_filter that uses that synonyms set
   - do:

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/synonyms/90_synonyms_reloading_for_synset.yml

@@ -28,7 +28,10 @@
   # This is to ensure that all index shards (write and read) are available. In serverless this can take some time.
   - do:
       cluster.health:
-        wait_for_no_initializing_shards: true
+        index: .synonyms-2
+        timeout: 2s
+        wait_for_status: green
+        ignore: 408
 
   # Create my_index1 with synonym_filter that uses synonyms_set1
   - do: