[CI] MixedClusterClientYamlTestSuiteIT test {p0=range/20_synthetic_source/Date range} failing - Removed Old Date range test because it's not longer validating useful code

muted-tests.yml

@@ -200,9 +200,6 @@ tests:
 - class: org.elasticsearch.threadpool.SimpleThreadPoolIT
   method: testThreadPoolMetrics
   issue: https://github.com/elastic/elasticsearch/issues/108320
-- class: org.elasticsearch.backwards.MixedClusterClientYamlTestSuiteIT
-  method: test {p0=range/20_synthetic_source/Date range}
-  issue: https://github.com/elastic/elasticsearch/issues/113874
 - class: org.elasticsearch.kibana.KibanaThreadPoolIT
   method: testBlockedThreadPoolsRejectUserRequests
   issue: https://github.com/elastic/elasticsearch/issues/113939

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/range/20_synthetic_source.yml

@@ -525,140 +525,6 @@ setup:
       _source:
         ip_range: { "gte": "2001:db8::", "lte": null }
 
----
-"Date range":
-  - skip:
-      cluster_features: ["mapper.range.date_range_indexing_fix"]
-      reason: "tests prior to rounding fixes in 8.16.0 that caused non-intuitive indexing and query because ranges were assumed to always index with 0's as the default such as when time is missing 00:00:00.000 time was assumed but for lte indexing and query missing time should be 23:59:59.999 as per docs here: https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-range-query.html"
-
-  - do:
-      index:
-        index: synthetic_source_test
-        id: "1"
-        body: { "date_range" : { "gte": "2017-09-01", "lte": "2017-09-05" } }
-
-  - do:
-      index:
-        index: synthetic_source_test
-        id: "2"
-        body: { "date_range" : { "gt": "2017-09-01", "lte": "2017-09-03" } }
-
-  - do:
-      index:
-        index: synthetic_source_test
-        id: "3"
-        body: { "date_range" : [ { "gte": "2017-09-04", "lt": "2017-09-05" } ] }
-
-  - do:
-      index:
-        index: synthetic_source_test
-        id: "4"
-        body: { "date_range" : [ { "gt": "2017-09-04", "lt": "2017-09-08" }, { "gt": "2017-09-04", "lt": "2017-09-07" } ] }
-
-  - do:
-      index:
-        index: synthetic_source_test
-        id: "5"
-        body: { "date_range" : { "gte": 1504224000000, "lte": 1504569600000 } }
-
-  - do:
-      index:
-        index: synthetic_source_test
-        id: "6"
-        body: { "date_range" : { "gte": "2017-09-01T10:20:30.123Z", "lte": "2017-09-05T03:04:05.789Z" } }
-
-  - do:
-      index:
-        index: synthetic_source_test
-        id: "7"
-        body: { "date_range" : null }
-
-  - do:
-      index:
-        index: synthetic_source_test
-        id: "8"
-        body: { "date_range": { "gte": null, "lte": "2017-09-05" } }
-
-  - do:
-      index:
-        index: synthetic_source_test
-        id: "9"
-        body: { "date_range": { "gte": "2017-09-05" } }
-
-  - do:
-      indices.refresh: {}
-
-  - do:
-      get:
-        index: synthetic_source_test
-        id: "1"
-  - match:
-      _source:
-        date_range:  { "gte": "2017-09-01T00:00:00.000Z", "lte": "2017-09-05T00:00:00.000Z" }
-
-  - do:
-      get:
-        index: synthetic_source_test
-        id: "2"
-  - match:
-      _source:
-        date_range: { "gte": "2017-09-01T00:00:00.001Z", "lte": "2017-09-03T00:00:00.000Z" }
-
-  - do:
-      get:
-        index: synthetic_source_test
-        id: "3"
-  - match:
-      _source:
-        date_range: { "gte": "2017-09-04T00:00:00.000Z", "lte": "2017-09-04T23:59:59.999Z" }
-
-  - do:
-      get:
-        index: synthetic_source_test
-        id: "4"
-  - match:
-      _source:
-        date_range: [ { "gte": "2017-09-04T00:00:00.001Z", "lte": "2017-09-06T23:59:59.999Z" }, { "gte": "2017-09-04T00:00:00.001Z", "lte": "2017-09-07T23:59:59.999Z" } ]
-
-  - do:
-      get:
-        index: synthetic_source_test
-        id: "5"
-  - match:
-      _source:
-        date_range: { "gte": "2017-09-01T00:00:00.000Z", "lte": "2017-09-05T00:00:00.000Z" }
-
-  - do:
-      get:
-        index: synthetic_source_test
-        id: "6"
-  - match:
-      _source:
-        date_range: { "gte": "2017-09-01T10:20:30.123Z", "lte": "2017-09-05T03:04:05.789Z" }
-
-  - do:
-      get:
-        index: synthetic_source_test
-        id: "7"
-  - match:
-      _source: {}
-
-  - do:
-      get:
-        index: synthetic_source_test
-        id: "8"
-  - match:
-      _source:
-        date_range: { "gte": null, "lte": "2017-09-05T00:00:00.000Z" }
-
-  - do:
-      get:
-        index: synthetic_source_test
-        id: "9"
-  - match:
-      _source:
-        date_range: { "gte": "2017-09-05T00:00:00.000Z", "lte": null }
-
 ---
 "Date range Rounding Fixes":
   - requires: