[tests-only] remove language related log outputs in unit-tests

[individual-it]

Description

• mock $ngettext & $pgettext
• shallowMount in Project.spec.js
• mock <translate> in Projects.spec.js & LocationPicker.spec.js
• mock v-translate directive

Related Issue

part of #6337

Motivation and Context

reduce log output in unit tests

How Has This Been Tested?

yarn run test:unit 2>&1 | wc -l

before this PR: 2641
after this PR: 583

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:

Open tasks:

• ...

[pascalwengerter]

This looks pretty neat already, but running yarn test:unit packages/web-app-files/tests/unit/views there's still some No translations found for en_US from views that are not included in this PR. Is there a specific reason you left them out?
Awesome progress on the topic btw!

[individual-it]

@pascalwengerter yes, those are form v-translate I could not quickly find a way to stub them

[individual-it]

Any idea how to do that?

[kulmann]

Any idea how to do that?

Should be possible like this vuejs/vue-test-utils#450 (comment) - global mock would be nicer though 🤔

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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[individual-it]

@kulmann thank you for the tip, I've mocked it in 46aea07
@pascalwengerter now all translation output should be gone

please review again

[kulmann]

😍