feat: Add initial AuthzQuerier implementation (#5919)

feat: Add initial AuthzQuerier implementation
- Adds package database/dbauthz that adds a database.Store implementation where each method goes through AuthZ checks
- Implements all database.Store methods on AuthzQuerier
- Updates and fixes unit tests where required
- Updates coderd initialization to use AuthzQuerier if codersdk.ExperimentAuthzQuerier is enabled

coderd/util/slice/slice.go

@@ -1,10 +1,5 @@
 package slice
 
-// New is a convenience method for creating []T.
-func New[T any](items ...T) []T {
-	return items
-}
-
 // SameElements returns true if the 2 lists have the same elements in any
 // order.
 func SameElements[T comparable](a []T, b []T) bool {
@@ -67,3 +62,8 @@ func OverlapCompare[T any](a []T, b []T, equal func(a, b T) bool) bool {
 	}
 	return false
 }
+
+// New is a convenience method for creating []T.
+func New[T any](items ...T) []T {
+	return items
+}