test: move slower tests into pummel and skip on slow devices

Move slower tests to pummel and skip on Raspberry Pi devices in CI.

Refs: https://github.com/nodejs/node/pull/34289#issuecomment-823655915

PR-URL: https://github.com/nodejs/node/pull/38395


Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Filip Skokan <panva.ip@gmail.com>