chore(e2e): Pin @embroider/macros to 1.19.7 in ember test apps

[github-actions]

Note

The pull request "chore(e2e): Pin @embroider/macros to 1.19.7 in ember test apps" was created by @andreiborza but did not reference an issue. Therefore this issue was created for better visibility in external tools like Linear.

Yesterday's @embroider/macros 1.20.0 release breaks our CI. Looks like the dynamic import of @sentry/browser is causing issues. Not really sure why yet tho but it leads to no pageload/navigation transactions in our e2e tests.

Pinning to the previous version to unblock us for now.

[linear]

JS-1804