fix(@angular/cli): only show add/update package install output on errors

[clydin]

Closes #16014
Closes #16027

[alan-agius4]

Nit: probably makes also sense to have a status indicator as per #15940

[clydin]

I'd like to do a larger refactor in the 9.x timeframe that combines the two so that there are not two different package install methods in the system.
Since this PR needs to go in 8.3.x, I think the changes should be kept minimal for now especially considering that (unlike during the actual update) only a single package is installed and 8.x does not have the ngcc post-install.

[vikerman]

Needs rebase

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