web streams have no Symbol.toStringTag on their prototypes

[KhafraDev]

Version

v18.11.0

Platform

Microsoft Windows NT 10.0.19043.0 x64

Subsystem

No response

What steps will reproduce the bug?

console.log(ReadableStream.prototype[Symbol.toStringTag])
console.log(WritableStream.prototype[Symbol.toStringTag])
console.log(TransformStream.prototype[Symbol.toStringTag])

How often does it reproduce? Is there a required condition?

No response

What is the expected behavior?

to log ReadableStream, WritableStream, TransformStream

What do you see instead?

undefined

Additional information

No response

[MrJithil]

Fixing PR #45117

[aduh95]

Fixed by e9ba08e