[DOC] Testing docs contain outdated information

[mrbazzan]

Description

Here is the link to the testing page,
it contains a lot of outdated information such as:

• reference to --vanilla that needs to be removed

TIP: Further work would be to check the advanced testing section and make
sure that the arguments listed on that page still exists

Do you want to help fix this documentation issue?

• Yes, I want to help fix this issue and I will join the channel #documentation on our Discord Server to confirm with the team that a PR is welcome.
• No, I only want to report the issue.

[RudraNarayan94]

@fsbraun Can I work on this issue?

[fsbraun]

@RudraNarayan94 That would be Great