MongoDB options never parse in connectionUrl and after my fix was parse incorrect

[gogotaro]

Issue Description

My understanding original of "parseConnectionUrl" method never parse options from connectionUrl as below.

return obeject at parseConnectionUrl method (original)

return {
            type: type,
            host: host,
            username: decodeURIComponent(username),
            password: decodeURIComponent(password),
            port: port ? parseInt(port) : undefined,
            database: afterBase || undefined
        };

But I try to use replicaSet option in connectionUrl and I ever fix issue #7401 with PR #7402 by separate method "parseMongoDBConnectionUrl" in class "DriverUtils" to parse connection mongodb only as below.

return obeject at parseMongoDBConnectionUrl method (my fixed #7402)

return {
            type: type,
            host: host,
            hostReplicaSet: hostReplicaSet,
            username: decodeURIComponent(username),
            password: decodeURIComponent(password),
            port: port ? parseInt(port) : undefined,
            database: afterBase || undefined,
            replicaSet: replicaSet || undefined
        };

It's working with option replicaSet only but another options wasn't working and parse incorrect.

PS. I know we can specified option key in connection object like { url: "mongodb://test-primary.example.com:27017/testdb", retryWrites: true, w: "majority", useUnifiedTopology: true} but some use case is inconvenience to do it.

Expected Behavior

My example connection string

mongodb://test-primary.example.com:27017/testdb?retryWrites=true&w=majority&useUnifiedTopology=true

I test by console.log(connectionString) at method "buildConnectionUrl" and console.log(mongoOptions) at method "buildConnectionOptions" in class "MongoDriver" and when connect was process result must be.

mongodb://test-primary.example.com:27017/testdb
{ retryWrites: 'true', w: 'majority', retryWrites: 'true' }

Actual Behavior

mongodb://test-primary.example.com:27017/testdb
{ replicaSet: 'true&w' }

As above my fix #7402 was make It parse incorrect. (Because I focus to parse replicaSet only, Sorry I'll fix It as fast as possible)

Steps to Reproduce

1. Create connection typescript source code

createConnection({
    type: "mongodb",
    url: "mongodb://test-primary.example.com:27017/testdb?retryWrites=true&w=majority&useUnifiedTopology=true"
}).then(connection => { 

   console.log("TypeORM with MongoDB"); 
}).catch(error => console.log(error));

2. console.log(connectionString) at method "buildConnectionUrl" and console.log(mongoOptions) at method "buildConnectionOptions" in class "MongoDriver"
3. run these connection code.

My Environment

Dependency	Version
Operating System	Ubuntu 20.04
Node.js version	v14.16.0
Typescript version	^v4.2.2
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.