Default include_type_name to false in the yml test harness. (#38058)

This PR removes the temporary change we made to the yml test harness in #37285
to automatically set `include_type_name` to `true` in index creation requests
if it's not already specified. This is possible now that the vast majority of
index creation requests were updated to be typeless in #37611. A few additional
tests also needed updating here.

Additionally, this PR updates the test harness to set `include_type_name` to
`false` in index creation requests when communicating with 6.x nodes. This
mirrors the logic added in #37611 to allow for typeless document write requests
in test set-up code. With this update in place, we can remove many references
to `include_type_name: false` from the yml tests.

Author: jtibshirani

modules/aggs-matrix-stats/src/test/resources/rest-api-spec/test/stats/20_empty_bucket.yml

@@ -2,7 +2,6 @@
 "Empty Bucket Aggregation":
   - do:
       indices.create:
-        include_type_name: false
         index: empty_bucket_idx
         body:
           settings:

modules/aggs-matrix-stats/src/test/resources/rest-api-spec/test/stats/30_single_value_field.yml

@@ -3,7 +3,6 @@ setup:
 
   - do:
       indices.create:
-        include_type_name: false
         index: test
         body:
           settings:

modules/aggs-matrix-stats/src/test/resources/rest-api-spec/test/stats/40_multi_value_field.yml

@@ -3,7 +3,6 @@ setup:
 
   - do:
       indices.create:
-        include_type_name: false
         index: test
         body:
           settings:

modules/analysis-common/src/test/resources/rest-api-spec/test/indices.analyze/10_analyze.yml

@@ -23,7 +23,6 @@
 
     - do:
         indices.create:
-          include_type_name: false
           index: test_deprecated_htmlstrip
           body:
             settings:

modules/analysis-common/src/test/resources/rest-api-spec/test/indices/validate_query/10_synonyms.yml

@@ -2,7 +2,6 @@
 "validate query with synonyms":
   - do:
       indices.create:
-        include_type_name: false
         index: test
         body:
           settings:

modules/analysis-common/src/test/resources/rest-api-spec/test/search.query/10_match.yml

@@ -5,7 +5,6 @@
   # versions in the same position.
   - do:
       indices.create:
-        include_type_name: false
         index: test
         body:
           settings:

modules/analysis-common/src/test/resources/rest-api-spec/test/search.query/20_ngram_search.yml

@@ -1,7 +1,6 @@
 "ngram search":
   - do:
       indices.create:
-        include_type_name: false
         index: test
         body:
           settings:
@@ -44,7 +43,6 @@
 "testNGramCopyField":
   - do:
       indices.create:
-        include_type_name: false
         index: test
         body:
           settings:

modules/analysis-common/src/test/resources/rest-api-spec/test/search.query/30_ngram_highligthing.yml

@@ -1,7 +1,6 @@
 "ngram highlighting":
   - do:
       indices.create:
-        include_type_name: false
         index: test
         body:
           settings:

modules/analysis-common/src/test/resources/rest-api-spec/test/search.query/40_query_string.yml

@@ -2,7 +2,6 @@
 "Test query string with snowball":
   - do:
       indices.create:
-          include_type_name: false
           index:  test
           body:
             mappings:

modules/analysis-common/src/test/resources/rest-api-spec/test/search.query/50_queries_with_synonyms.yml

@@ -2,7 +2,6 @@
 "Test common terms query with stacked tokens":
   - do:
       indices.create:
-          include_type_name: false
           index: test
           body:
             settings:
@@ -220,7 +219,6 @@
 "Test match query with synonyms - see #3881 for extensive description of the issue":
   - do:
       indices.create:
-          include_type_name: false
           index: test
           body:
             settings: