Get this repo working with embroider v3+

[ynotdraw]

As part of #200, we are disabling embroider-optimized tests to unblock our work. We started getting the following errors with the embroider-optimized tests with that PR:

test-app:test: [1]   - message: ../node_modules/.pnpm/file+packages+ember-toucan-core_@babel+core@7.20.1_chhstik6enqihwk47y4lzcbm7a/node_modules/@crowdstrike/ember-toucan-core/dist/components/form/controls/combobox.js: Module not found: Error: @crowdstrike/ember-toucan-core is trying to import from #embroider_compat but that is not one of its explicit dependencies

The suggestion was to attempt to upgrade pnpm and embroider dependencies to the latest as done in #205; however, we still have a few issues with those changes. In particular:

test-app:test: [1] $TMPDIR/embroider/c6249b/node_modules/.pnpm/file+packages+ember-toucan-core_@babel+core@7.20.12_@crowdstrike+ember-toucan-styles@2.0.2_@e_tm5lpotvrba5vzg34cuvh2fqxm/node_modules/@crowdstrike/ember-toucan-core/dist/components/form/controls/combobox.js/combobox.js: Unsafe dynamic component: this.Option in $TMPDIR/embroider/c6249b/node_modules/.pnpm/file+packages+ember-toucan-core_@babel+core@7.20.12_@crowdstrike+ember-toucan-styles@2.0.2_@e_tm5lpotvrba5vzg34cuvh2fqxm/node_modules/@crowdstrike/ember-toucan-core/dist/components/form/controls/combobox.js

This is because we removed the ensure-safe-component helper as part of that PR.

When adding back the ensure-safe-component helper, we get a new error from #206. You can view the full action log here

test-app:test: [1]   - broccoliBuilderErrorStack: ModuleNotFoundError: Module not found: Error: Can't resolve './helpers/ensure-safe-component' in '/home/runner/work/ember-toucan-core/ember-toucan-core/test-app/node_modules/.embroider/rewritten-app'

Chatting with @simonihmig , it's thought that this issue may be related to embroider-build/embroider#1514, as it sound similar.

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The outcome of this issue should be:

• Resolve any embroider issues as listed above that'll unblock us
• Upgrade to the latest embroider version(s)
• Use the embroider strict settings as done here