Previously, the ivy-2019 branch of the Material (aka components) repo was
used, which contains some changes that were necessary to work with Ivy.
These changes are not longer necessary, as Material's master branch is
fully working with Ivy today. To be up-to-date with recent Material
development and its support for more recent dependencies, e.g. TypeScript,
it is desirable for us to be on a newer version of Material.
This commit moves the Material tests away from the ivy-2019 branch, to a
recent commit on master. We are not targeting the master branch itself,
as that would introduce a moving target into Angular's CI checks, which
is undesirable.
Lastly, the usage of gulp to run Material's tests is changed into using
Bazel, as Material itself is now also built with Bazel.
PR Close#31569
Currently we cache the Material `node_modules` after
the `run_angular_material_unit_tests.sh` completed. This
means that the cache will incorrectly contain the Ivy NPM
package output which might be incompatible with the
other Material dependencies. e.g. the Material postinstall
command now uses a different NGC version that does not
work with the `typescript` version that has been specified in
the Material project.
PR Close#29416
JoostK
Paul Gschwendtner
Matias Niemelä
Jeremy Elbourn