fix(compiler): remove i18n markup even if no translations

[vicb]

Fixes #11042

Supersedes #17959 (failing circleCI)

I approved the original PR

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[mary-poppins]

You can preview bc4dfc5 at https://pr17999-bc4dfc5.ngbuilds.io/.

[vicb]

@ocombe Sorry that the commit got attributed to me - it's how the GH merge button work (it would take the PR author instead of the commit author), a "feature" according to GH support.

[actra-gschuster]

In general I understand the motivation for this "fix".
But in my case it destroys the functionality of inlining all translations at compile-time because the parser throws away the attributes too early.
This should definitely be configurable if one wants to throw away the attributes.

Use case: @actra-development-oss/ng-i18n-aot-loader
See #16477 (comment) for further details.

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