build: do not update shared dev-infra package in snapshot jobs
build: do not update shared dev-infra package in snapshot jobs

Currently the snapshot jobs also update the shared dev-infra package
to the latest available build. This means that the snapshot CI jobs
can start failing if the dev-infra package changes so that our
repository tooling breaks. We only want to test against framework
snapshot builds, and not test against snapshot dev-infra tooling.

DevVersion/material2,mmalerba/material2,josephperrott/material2,josephperrott/material2,angular/components,mmalerba/material2,josephperrott/material2,angular/components,mmalerba/material2,crisbeto/material2,angular/components,DevVersion/material2,mmalerba/material2,crisbeto/material2,DevVersion/material2,josephperrott/material2,crisbeto/material2,mmalerba/material2,josephperrott/material2,DevVersion/material2,DevVersion/material2,angular/components,crisbeto/material2