build: use afs on aks instead of circle cache (electron#39881)

* build: use afs on aks instead of circle cache

* build: do not use aks logic on linux hosts checking out for macOS

* build: fix gn-check could-be-aks

* build: sigh

* build: no ls mnt

* build: keep build alive while debugging

* build: make debuggable

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Co-authored-by: John Kleinschmidt <[email protected]>

Author: 2 people