[Auto Suggest] PPL autocomplete fixes (opensearch-project#8087) (open…

…search-project#8260)

* add stats agg functions and insert snippet rules



* allow table suggestions with table name



* stop suggestion search from filter



* keep user hint height and pos constant



* fix issue where identifiers would suggest twice, after WS



* add some priority based tokens to appear at the top



* reenable plus and minus for sort command



* Changeset file for PR opensearch-project#8087 created/updated

* update user hints



* update types



---------



(cherry picked from commit 8118024)

Signed-off-by: Paul Sebastian <[email protected]>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: opensearch-changeset-bot[bot] <154024398+opensearch-changeset-bot[bot]@users.noreply.github.com>
Co-authored-by: Qingyang(Abby) Hu <[email protected]>

changelogs/fragments/8087.yml

@@ -0,0 +1,2 @@
+fix:
+- PPL Autocomplete functions, fields, & table suggestion ([#8087](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/8087))

src/plugins/data/public/antlr/opensearch_ppl/.generated/OpenSearchPPLLexer.ts

@@ -1,4 +1,4 @@
-// Generated from ./src/plugins/data/public/antlr/opensearch_ppl/grammar/OpenSearchPPLLexer.g4 by ANTLR 4.13.1
+// Generated from grammar/OpenSearchPPLLexer.g4 by ANTLR 4.13.1
 
 import * as antlr from "antlr4ng";
 import { Token } from "antlr4ng";