build: use container runner for arm tests (#40934)

* build: use aks arm64 test runners

Co-authored-by: Samuel Attard <samuel.r.attard@gmail.com>

* build: better image

Co-authored-by: Samuel Attard <samuel.r.attard@gmail.com>

* build: even more stuff

Co-authored-by: Samuel Attard <samuel.r.attard@gmail.com>

* build: arm par

Co-authored-by: Samuel Attard <samuel.r.attard@gmail.com>

* build: use aks arm32

Co-authored-by: Samuel Attard <samuel.r.attard@gmail.com>

* build: arm32 par

Co-authored-by: Samuel Attard <samuel.r.attard@gmail.com>

* build: get test timings from abs paths

Co-authored-by: Samuel Attard <samuel.r.attard@gmail.com>

* build: avoid realpath, use echo

Co-authored-by: Samuel Attard <samuel.r.attard@gmail.com>

* chore: fix contentTracing test

* cry

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Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Samuel Attard <samuel.r.attard@gmail.com>
Co-authored-by: Samuel Attard <marshallofsound@electronjs.org>