feat: sql dialect for different protocols (#1631)

* feat: add SqlDialect to query context

* feat: use session in postgrel handlers

* chore: refactor sql dialect

* feat: use different dialects for different sql protocols

* feat: adds GreptimeDbDialect

* refactor: replace GenericDialect with GreptimeDbDialect

* feat: save user info to session

* fix: compile error

* fix: test

src/session/Cargo.toml

@@ -9,3 +9,4 @@ arc-swap = "1.5"
 common-catalog = { path = "../common/catalog" }
 common-telemetry = { path = "../common/telemetry" }
 common-time = { path = "../common/time" }
+sql = { path = "../sql" }