Storage: Unified Storage based on Entity API (#71977)

* first round of entityapi updates

- quote column names and clean up insert/update queries
- replace grn with guid
- streamline table structure

fixes

streamline entity history

move EntitySummary into proto

remove EntitySummary

add guid to json

fix tests

change DB_Uuid to DB_NVarchar

fix folder test

convert interface to any

more cleanup

start entity store under grafana-apiserver dskit target

CRUD working, kind of

rough cut of wiring entity api to kube-apiserver

fake grafana user in context

add key to entity

list working

revert unnecessary changes

move entity storage files to their own package, clean up

use accessor to read/write grafana annotations

implement separate Create and Update functions

* go mod tidy

* switch from Kind to resource

* basic grpc storage server

* basic support for grpc entity store

* don't connect to database unless it's needed, pass user identity over grpc

* support getting user from k8s context, fix some mysql issues

* assign owner to snowflake dependency

* switch from ulid to uuid for guids

* cleanup, rename Search to List

* remove entityListResult

* EntityAPI: remove extra user abstraction (#79033)

* remove extra user abstraction

* add test stub (but

* move grpc context setup into client wrapper, fix lint issue

* remove unused constants

* remove custom json stuff

* basic list filtering, add todo

* change target to storage-server, allow entityStore flag in prod mode

* fix issue with Update

* EntityAPI: make test work, need to resolve expected differences (#79123)

* make test work, need to resolve expected differences

* remove the fields not supported by legacy

* sanitize out the bits legacy does not support

* sanitize out the bits legacy does not support

---------

Co-authored-by: Ryan McKinley <ryantxu@gmail.com>

* update feature toggle generated files

* remove unused http headers

* update feature flag strategy

* devmode

* update readme

* spelling

* readme

---------

Co-authored-by: Ryan McKinley <ryantxu@gmail.com>

pkg/services/sqlstore/sqlstore.go

@@ -578,7 +578,7 @@ type InitTestDBOpt struct {
 
 var featuresEnabledDuringTests = []string{
 	featuremgmt.FlagPanelTitleSearch,
-	featuremgmt.FlagEntityStore,
+	featuremgmt.FlagUnifiedStorage,
 }
 
 // InitTestDBWithMigration initializes the test DB given custom migrations.