build(docs-infra): ensure the locally built packages exist and are up-to-date in yarn setup-local (#31985)

The `setup-local` npm script uses `NgPackagesInstaller` to replace the
Angular packages with the locally built ones. Previously, it would (a)
assume that the packages were built and (b) it would do anything if the
currently installed versions already correspond to locally built
packages (even if not the latest version).
This could lead to all sorts of errors, such as:
- Confusing error messages, `dist/packages-dist/` was missing.
- Using outdated build artifacts from `dist/packages-dist/` without a
  warning.
- Not installing the latest locally built packages, because the ones
  installed already corresponded to locally built (but older) ones.

This commit fixes these issues by ensuring that:
- The local packages are always built before being used by
  `NgPackagesInstaller`.
- The local packages are installed, even if the ones install already
  correspond to local packages.

NOTE: Special `*-ci` scripts are introduced (for use on CI) that skip
      building the local packages, since that step would have been taken
      care of (in a more efficient way) in a previous CI step.

PR Close #31985

aio/tools/examples/run-example-e2e.js

@@ -46,6 +46,8 @@ if (argv.ivy) {
  *    Must be used in conjunction with --setup as this is when the packages are copied.
  *    e.g. --setup --local
  *
+ *  --ivy to turn on `ivy` mode
+ *
  *  --shard to shard the specs into groups to allow you to run them in parallel
  *    e.g. --shard=0/2 // the even specs: 0, 2, 4, etc
  *    e.g. --shard=1/2 // the odd specs: 1, 3, 5, etc