Revert "Manage the big stuff as early as possible"

Build Chromium in a separate project and install in Stage 2.

This reverts commit b0bf06c3.
11 jobs for main in 1177 minutes and 23 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #1157
nest
Build cortex-a53-crypto-server

01:50:11

passed #1155
nest
Build cortex-a72-a53-crypto-workstation

15:41:42

passed #1156
nest
Build cortex-a72-workstation

15:33:42

passed #1158
nest
Build cortex-a8-server

01:47:35

passed #1148
nest
Build haswell-server

00:17:50

passed #1154
nest
Build haswell-workstation

02:04:39

canceled #1152
nest
Build cortex-a53-crypto-server

canceled #1150
nest
Build cortex-a72-a53-crypto-workstation

10:06:06

canceled #1151
nest
Build cortex-a72-workstation

07:34:20

canceled #1153
nest
Build cortex-a8-server

failed #1149
nest
Build haswell-workstation

02:49:35