[tests-only] fix log output of unit test in FileShares.spec

[individual-it]

Description

fix unit test log output of FileShares.spec.js

Related Issue

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

Motivation and Context

get rid of these log outputs, make the tests work correctly

  console.error
    [Vue warn]: The setup binding property "sharesLoading" is already declared.

    found in

    ---> <FileShares>
           <Root>

      at Object.warn (node_modules/vue/dist/vue.runtime.common.dev.js:621:15)
      at warn (node_modules/@vue/composition-api/dist/vue-composition-api.common.js:427:18)
      at asVmProperty (node_modules/@vue/composition-api/dist/vue-composition-api.common.js:1764:13)
      at node_modules/@vue/composition-api/dist/vue-composition-api.common.js:2006:17
          at Array.forEach (<anonymous>)
      at initSetup (node_modules/@vue/composition-api/dist/vue-composition-api.common.js:1982:39)
      at VueComponent.wrappedData (node_modules/@vue/composition-api/dist/vue-composition-api.common.js:1943:13)

How Has This Been Tested?

running tests locally

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]

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