[microTVM] Refactor zephyr installation + Update Zephyr RVM doc#7915

Merged

areusch merged 7 commits intoapache:mainfrom

mehrdadh:refactor_zephyr

Apr 28, 2021

Commits on Apr 23, 2021

Commits on Apr 24, 2021

fix
mehrdadh
committed

Commits on Apr 26, 2021

different zephyr branch
mehrdadh
committed

Commits on Apr 27, 2021

trigger build
mehrdadh
committed