Analyse if we gonna change how we use blob storage causing memory leak

[TheTechArch]

Description

It has been identified that instansiating new CloudBlobClients can cause memoryleaks for Application Insight
microsoft/ApplicationInsights-dotnet#1867 (comment)

We experience memory leaks for ApplicationInsight and we do the same in storage component.

We should look in to if we can rewrite our code to reduce the problem. A 100% fix would require fix from MS.

See datarepository
https://github.com/Altinn/altinn-studio/blob/master/src/Altinn.Platform/Altinn.Platform.Storage/Storage/Repository/DataRepository.cs

Considerations

• We use different blob accounts depending on the service owner. We can not create on shared client. We would need serveral.

Acceptance criteria

Describe criteria here (i.e. What is allowed/not allowed (negative tesing), validations, error messages and warnings etc.)

Specification tasks

• Development tasks are defined
• Test design / decide test need

Development tasks

Add tasks here

Definition of done

Verify that this issue meets DoD (Only for project members) before closing.

• Documentation is updated (if relevant)
  • Technical documentation (docs.altinn.studio)
  • User documentation (altinn.github.io/docs)
• QA
• Manual test is complete (if relevant)
• Automated test is implemented (if relevant)
• All tasks in this userstory are closed (i.e. remaining tasks are moved to other user stories or marked obsolete)

[TheTechArch]

We dont have any konen issue with this