Search: Fixes search limits and adds a page parameter (#16458)

* Search: Fixes search limits and adds a page parameter

This adds a page parameter to search api without adding
any major breaking change.

It does at an api validation error when trying to use
a limit beyond 5000. This is a breaking change. We could
remove this and have it only in the docs and describe that this
is a limit that grafana will apply silently.

Fixes #16049

* Fix: Corrected wrong array slice change

* Docs: minor docs fix

* Search: fixed folder tests

* Fixed: Moved limit to correct inner query

* Search: moving limit check and page check

* Search: limit in handler is no longer needed

pkg/services/sqlstore/search_builder_test.go

@@ -14,7 +14,7 @@ func TestSearchBuilder(t *testing.T) {
 			UserId: 1,
 		}
 
-		sb := NewSearchBuilder(signedInUser, 1000, m.PERMISSION_VIEW)
+		sb := NewSearchBuilder(signedInUser, 1000, 0, m.PERMISSION_VIEW)
 
 		Convey("When building a normal search", func() {
 			sql, params := sb.IsStarred().WithTitle("test").ToSql()