[tests-only] mock v-translate directive in views tests

[individual-it]

Description

mock v-translate here also, simmilar to https://github.com/owncloud/web/pull/6404/files#diff-0dd79c75d790d047f8dde209581a57ea4dc2708fcda916ad00f5aee313d7e02dR38

Related Issue

• part of Lots of warnings & errors when running unit tests #6337

Motivation and Context

get rid of warnings like

    console.warn
      No translations found for en_US

      at Object.getTranslation (node_modules/vue-gettext/dist/vue-gettext.js:357:19)
      at updateTranslation (node_modules/vue-gettext/dist/vue-gettext.js:700:33)
      at bind (node_modules/vue-gettext/dist/vue-gettext.js:756:7)
      at callHook$1 (node_modules/vue/dist/vue.runtime.common.dev.js:6702:7)
      at _update (node_modules/vue/dist/vue.runtime.common.dev.js:6623:7)
      at Array.updateDirectives (node_modules/vue/dist/vue.runtime.common.dev.js:6604:5)
      at invokeCreateHooks (node_modules/vue/dist/vue.runtime.common.dev.js:6093:22)
      at createElm (node_modules/vue/dist/vue.runtime.common.dev.js:5980:11)

How Has This Been Tested?

running unit tests

Screenshots (if appropriate):

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:

• ...

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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