Elastic config updates

* change name to not have QA
* add configurable ELSER endpoint

ask_candid/base/config/connections.py

@@ -20,10 +20,11 @@ class BaseElasticAPIKeyCredential:
     api_key: str | None = field(default_factory=str)
 
 
-SEMANTIC_ELASTIC_QA = BaseElasticAPIKeyCredential(
+SEMANTIC_ELASTIC = BaseElasticAPIKeyCredential(
     cloud_id=_load_value("SEMANTIC_ELASTIC_CLOUD_ID"),
     api_key=_load_value("SEMANTIC_ELASTIC_API_KEY"),
 )
+ELSER_INFERENCE_ID = _load_value("ELSER_INFERENCE_ID") or "elser_model_2_linux-x86_64_search"
 
 SEMANTIC_ELASTIC_QA_WRITER = BaseElasticAPIKeyCredential(
     cloud_id=_load_value("SEMANTIC_ELASTIC_WRITER_CLOUD_ID"),