test: remove common.hasTracing

`common.hasTracing` is only used in one place. `common` is bloated so
let's move that to the one test that uses it.

`hasTracing` is undocumented so there's no need to remove it from the
README file as it's not there in the first place.

Similarly, it's not included in the .mjs version of the `common` file.

PR-URL: https://github.com/nodejs/node/pull/22250


Reviewed-By: Bryan English <bryan@bryanenglish.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: George Adams <george.adams@uk.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>