Chore: Fix typescript strict null fixes now at 298 (#26125)

* Chore: Fix typescript strict null errors

* Added new limit

* Fixed ts issue

* fixed tests

* trying to fix type inference

* Fixing more ts errors

* Revert tsconfig option

* Fix

* Fixed code

* More fixes

* fix tests

* Updated snapshot

* Chore: More ts strict null fixes

* More fixes in some really messed up azure config components

* More fixes, current count: 441

* 419

* More fixes

* Fixed invalid initial state in explore

* Fixing tests

* Fixed tests

* Explore fix

* More fixes

* Progress

* Sub 300

* Fixed incorrect type

* removed unused import

public/app/plugins/datasource/postgres/specs/postgres_query.test.ts

@@ -4,7 +4,7 @@ import { TemplateSrv } from 'app/features/templating/template_srv';
 describe('PostgresQuery', () => {
   // @ts-ignore
   const templateSrv: TemplateSrv = {
-    replace: jest.fn(text => text),
+    replace: jest.fn(text => text) as any,
   };
 
   describe('When initializing', () => {