We need to migrate to using angular_ivy_enabled value to determine whether to use
Ivy or ViewEngine for package building scripts and for size-tracking and
symbol-extract tooling.
PR Close#33983
Since `scripts/package-builder.js` gets run from the
`aio` folder sometimes, it is important to set the cwd
for the command that finds the bazel bin directory.
PR Close#33904
In #33823, `scripts/package-builds.sh` (which is used by both
`build-packages-dist.sh` and `build-ivy-npm-packages.sh`) was updated to
use `realpath`. It turns out that `realpath` does not exist on macOS, so
the build scripts do not work there.
In order to fix this (and also reduce the likelihood of introducing
similar issues in the future), this commit changes these bash scripts to
Node.js scripts (using [ShellJS](https://github.com/shelljs/shelljs) for
a cross-platform implementation of Unix shell commands where necessary).
PR Close#33854
Greg Magolan
Joey Perrott
Pete Bacon Darwin
George Kalpakas