UpdateResult and DeleteResult return affected as undefined for Aurora Data API driver

[coyoteecd]

Issue Description

Aurora Data API driver started as a clone of MysqlDriver and for DeleteQueryBuilder, it copies the number of deleted rows from result.affectedRows. But Aurora Data API driver returns this in a numberOfRecordsUpdated property, therefore affected is left undefined.

For UpdateQueryBuilder, affected is not handled at all (the driver implementation was copied before #5628 landed in master). The same fix needs to be applied there as well.

Expected Behavior

When using repository.insert(entity), the InsertResult.affected value should reflect what's being returned by the low-level API via the numberOfRecordsUpdated property.
Likewise, when using repository.update(entity), the UpdateResult.affected should do the same as insert.

Actual Behavior

In both cases, affected is undefined.

My Environment

Dependency	Version
Operating System	Windows 10
Node.js version	v12.14.0
Typescript version	v4.1.3
TypeORM version	v0.2.31

Relevant Database Driver(s)

• aurora-data-api
• aurora-data-api-pg
• better-sqlite3
• cockroachdb
• cordova
• expo
• mongodb
• mysql
• nativescript
• oracle
• postgres
• react-native
• sap
• sqlite
• sqlite-abstract
• sqljs
• sqlserver

Are you willing to resolve this issue by submitting a Pull Request?

• Yes, I have the time, and I know how to start.
• Yes, I have the time, but I don't know how to start. I would need guidance.
• No, I don't have the time, although I believe I could do it if I had the time...
• No, I don't have the time and I wouldn't even know how to start.