chore(ci): remove ng12-15 apps, add ng16-17 for stencil nightlies (#2…

…8945)

Issue number: Internal

---------

<!-- Please do not submit updates to dependencies unless it fixes an
issue. -->

<!-- Please try to limit your pull request to one type (bugfix, feature,
etc). Submit multiple pull requests if needed. -->

## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->

The Stencil nightlies are still attempting to run old Angular test apps
and does not test ng16/17

## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->

- Removed ng12-15 test apps
- Added ng16-17 test apps

I opted to remove ng14-15 because we are in the process of dropping
support for it in Ionic 8.

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

<!--
  If this introduces a breaking change:
1. Describe the impact and migration path for existing applications
below.
  2. Update the BREAKING.md file with the breaking change.
3. Add "BREAKING CHANGE: [...]" to the commit description when merging.
See
https://github.com/ionic-team/ionic-framework/blob/main/.github/CONTRIBUTING.md#footer
for more information.
-->


## Other information

<!-- Any other information that is important to this PR such as
screenshots of how the component looks before and after the change. -->

.github/workflows/stencil-nightly.yml

@@ -150,7 +150,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        apps: [ng12, ng13, ng14, ng15]
+        apps: [ng16, ng17]
     needs: [build-angular, build-angular-server]
     runs-on: ubuntu-latest
     steps: