feat[core]: partially update embedded object properties

[dvlalex]

I've added in some logic for when an embedded property is set as { object: true }.

Currently an old query that was:
[query] db.getCollection('user').updateMany({ _id: ObjectId('5fcf95d54f6a9653930f3c8b') }, { '$set': { address1_city: 'new city', address4: { street: null, postalCode: null, city: 'new city 4', country: null } } }, { session: undefined }); [took 2 ms]

now, looks like:
[query] db.getCollection('user').updateMany({ _id: ObjectId('5fcf96cd2c05055470c9edff') }, { '$set': { address1_city: 'new city', address4: { city: 'new city 4' } } }, { session: undefined }); [took 2 ms]

So the changes are computed properly for object types, but I'm not sure where to go from now. I'd have to tap into each specific driver and make sure that for embedded objects on update it doesnt replace the value. Any pointers / ideas?

Is this a good place to do so for mongo?

mikro-orm/packages/mongodb/src/MongoDriver.ts

Line 190 in f3beb7f

private renameFields<T>(entityName: string, data: T, where = false): T {