Add strict_allow_templates dynamic mapping option (opensearch-proje…

…ct#14555) (opensearch-project#14737) (opensearch-project#14742)

* The dynamic mapping parameter supports strict_allow_templates

* Modify change log

* Modify skip version in yml test file

* Refactor some code

* Keep the old methods

* change public to private

* Optimize some code

* Do not override toString method for Dynamic

* Optimize some code and modify the changelog

---------

(cherry picked from commit 6b8b3ef)

Signed-off-by: Gao Binlong <gbinlong@amazon.com>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Signed-off-by: Andriy Redko <andriy.redko@aiven.io>
Co-authored-by: opensearch-trigger-bot[bot] <98922864+opensearch-trigger-bot[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

rest-api-spec/src/main/resources/rest-api-spec/test/index/110_strict_allow_templates.yml

@@ -1,8 +1,8 @@
 ---
 "Index documents with setting dynamic parameter to strict_allow_templates in the mapping of the index":
   - skip:
-      version: " - 2.99.99"
-      reason: "introduced in 3.0.0"
+      version: " - 2.15.99"
+      reason: "introduced in 2.16.0"
 
   - do:
       indices.create:

rest-api-spec/src/main/resources/rest-api-spec/test/indices.put_mapping/all_path_options.yml

@@ -163,8 +163,8 @@ setup:
 ---
 "post a mapping with setting dynamic to strict_allow_templates":
   - skip:
-      version: " - 2.99.99"
-      reason: "introduced in 3.0.0"
+      version: " - 2.15.99"
+      reason: "introduced in 2.16.0"
   - do:
       indices.put_mapping:
         index: test_index1