Synonyms API - Add refresh parameter

[carlosdelest]

Following elastic/elasticsearch#126935, we will be adding a refresh parameter to the following Synonyms API requests:

• Update synonyms set
• Update synonym rule
• Delete synonym rule

When refresh is false, the reload analyzer details will not be present in the responses - they have been updated accordingly.

[github-actions]

Following you can find the validation results for the APIs you have changed.

API	Status	Request	Response
synonyms.delete_synonym_rule	🟢	7/7	7/7
synonyms.delete_synonym	🟢	6/6	6/6
synonyms.get_synonym_rule	🟢	4/4	4/4
synonyms.get_synonym	🟢	16/16	16/16
synonyms.get_synonyms_sets	🟢	6/6	6/6
synonyms.put_synonym_rule	🟢	4/4	4/4
synonyms.put_synonym	🟢	28/28	28/28

You can validate these APIs yourself by using the make validate target.