feat: reject update/delete without where

[SamuelBrucksch]

To discuss:

• singletons -> check needed?
• DELETE Foo(123)/bar -> would fail right now, should we check for to-one?

[schiwekM]

To discuss:

• singletons -> check needed?
• DELETE Foo(123)/bar -> would fail right now, should we check for to-one?

I'd say for singletons not needed and to-one should be excluded as it is spec compliant

[danjoa]

Suggested change

	if (!cqn.where && !cqn.from?.ref?.at(-1).where && !cqn.entity?.ref?.at(-1).where) {
	if (!cqn.where && !(cqn.from || cqn.entity)?.ref?.at(-1).where) {

[danjoa]

Suggested change

	const op = query.DELETE ? 'delete' : 'update'
	return cds.error(`Trying to ${op} all entites. Call .where(...) explicitely, to ${op} all entities.`)
	return cds.error(`${query.DELETE ? 'DELETE' : 'UPDATE'} without a where clause, which would affect all entites in the table. Add where 1=1 if your really want to do so`)