Auto merge of #53527 - Emerentius:test_all, r=nrc
Auto merge of #53527 - Emerentius:test_all, r=nrc

Add option to run all tests

This adds the "--include-ignored" flag to libtest, which allows running ignored and unignored tests in one go.

Closes #50363

aidancully/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,graydon/rust,graydon/rust,aidancully/rust,GBGamer/rust,aidancully/rust,aidancully/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,GBGamer/rust