refactor: enable exactOptionalPropertyTypes

[DeJayDev]

Which problem is this PR solving?

I aim to close #3713 by enabling exactOptionalPropertyTypes in the tsconfig.base.json.

Fixes #3713.

Short description of the changes

Per the description of the linked PR, this will allow OpenTelemetry typings to resolve without error in modern projects or projects who are not using skipLibCheck.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• Followed the style guidelines of this project
• Unit tests have been added
• Documentation has been updated

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: DeJayDev / name: Dj Isaac (52a64eb, bb60728, 40371ee, 66d081e)

[DeJayDev]

I'm going to need help here, it's not as easy as just flipping the option it seems :/

My understanding is this would require a very large rewrite that I just cannot do. In it's current position, all tests run and pass locally (leading to the creation of the PR) but running compile like the Actions do will fail.

[pichlermarc]

I'm going to need help here, it's not as easy as just flipping the option it seems :/

My understanding is this would require a very large rewrite that I just cannot do. In it's current position, all tests run and pass locally (leading to the creation of the PR) but running compile like the Actions do will fail.

Yes all the errors one is seeing locally when using it with exactOptionalPropertyTypes will also occur in internal code and tests when the switch is turned on (it's all written with exactOptionalPropertyTypes off) . Tests may work as it's not re-compiled yet - possibly the version of ts-node that's used does not error on this option. The amount of work required for us to do this is the reason why we have not made the change yet - there are other issues that currently don't have a work-around yet so they get priority.

It'll be a massive change to the code-base. I wish it was as easy as flipping a switch 😓

[pichlermarc]

@DeJayDev I don't have time to work on this at the moment, so with your permission I'd like to close this PR to indicate to others that this is still up-for-grabs.