feat!: no default tabs when using Shelf Layout

[jstarpl]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

Feature change - this is a breaking change for anyone using Custom Shelf Layouts.

• What is the current behavior? (You can also link to an open issue here)

When custom Shelf Layout is used, AdLibs and Global AdLib tabs are still shown.

• What is the new behavior (if this is a feature change)?

When a custom Shelf Layout is used, AdLibs and Global AdLibs tabs are not shown.

• Other information:

This PR refactors a lot of the AdLib Shelf List code to be more modular and use React Hooks whenever possible. Also, since these custom Tabs will now need to sometimes function as main AdLib and Global AdLib tabs, the rendering performance of this component has been increased through use of memoization. Some unused code was removed also. Also, regular Global AdLib panel has been refactored so that it's just an AdLib panel with a hard-coded filter. This should DRY the code out some.

Status

• Code documentation for the relevant parts in the code have been added/updated by the PR author
• The functionality has been tested by the PR author
• The functionality has been tested by NRK

[codecov-commenter]

Codecov Report

Merging #684 (6a62e9d) into release41 (e311477) will not change coverage.
The diff coverage is n/a.

❗ Current head 6a62e9d differs from pull request most recent head 42b6a9d. Consider uploading reports for the commit 42b6a9d to get more accurate results

@@            Coverage Diff             @@
##           release41     #684   +/-   ##
==========================================
  Coverage      69.46%   69.46%           
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  Files            299      299           
  Lines          33347    33347           
  Branches        4664     4664           
==========================================
  Hits           23164    23164           
  Misses          9735     9735           
  Partials         448      448           

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