Mark database parameters in Peewee as optional (#13442)

Peewee injects database arguments using a decorator whenever a model
or query has a bound connection. Passing the argument is therefore not
required, even for some function parameters without default values.

stubs/peewee/@tests/stubtest_allowlist.txt

@@ -11,6 +11,16 @@ peewee.DQ.__invert__
 peewee.Window.as_groups
 peewee.Window.as_range
 peewee.Window.as_rows
+# Wrapped with @database_required which sometimes injects the database argument
+peewee.BaseQuery.execute
+peewee.CompoundSelectQuery.exists
+peewee.SelectBase.count
+peewee.SelectBase.exists
+peewee.SelectBase.first
+peewee.SelectBase.get
+peewee.SelectBase.peek
+peewee.SelectBase.scalar
+peewee.SelectBase.scalars
 
 # Ignore missing playhouse modules and names we don't currently provide
 playhouse\.\w+?