Remove remaining dependencies on Moment.js

[stopfstedt]

this finally frees us of any remaining dependencies on Moment.js.

fixes ilios/ilios#5193

stefan@nichtsnutz: ~/dev/projects/frontend on moment-to-luxon-conversion-the-rest
$ grep -ri 'moment' packages | egrep -v '(node_modules|dist)'
packages/ilios-common/translations/en-us.yaml:  waitSaving: saving... one moment...
packages/ilios-common/translations/es.yaml:  waitSaving: Salvando... un momento...
packages/ilios-common/translations/fr.yaml:  waitSaving: Travaille dessus... un moment...
packages/frontend/app/components/reports/subject/new/academic-year.js:    yield timeout(1); //wait a moment so we can render before setting
packages/frontend/app/components/reports/subject/new/program.js:    await timeout(1); //wait a moment so we can render before setting
packages/frontend/app/components/reports/subject/new/term.js:    await timeout(1); //wait a moment so we can render before setting
packages/frontend/app/components/reports/subject/new/instructor-group.js:    await timeout(1); //wait a moment so we can render before setting
packages/frontend/app/components/reports/subject/new/session-type.js:    await timeout(1); //wait a moment so we can render before setting
packages/frontend/app/components/reports/subject/new/competency.js:    await timeout(1); //wait a moment so we can render before setting
packages/frontend/app/components/reports/subject/new/program-year.js:    await timeout(1); //wait a moment so we can render before setting
packages/test-app/tests/integration/components/wait-saving-test.js:    assert.dom(this.element).hasText('saving... one moment...');

[dartajax]

As far as switching languages is concerned, the behavior is consistent with demo so ... looks good to me in that regard for sure.

[jrjohnson]

🎉 💯 woot! 😀 😂