VSA: Split TypeOfWorkCharts into loader/chart components

What does this MR do and why?

Follow-up to !166170 (merged) which broke the default storybook example due to moving the data fetching out of Vuex.

Refactors the TypeOfWorkCharts component into TypeOfWorkChartsLoader/TypeOfWorkCharts components, which handle the data loading/rendering respectively.

MR acceptance checklist

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Screenshots or screen recordings

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Before	After

How to set up and validate locally

1. Ensure you are using GitLab Ultimate
2. Create a new Project
3. Generate mock data: FILTER=customizable_cycle_analytics SEED_CUSTOMIZABLE_CYCLE_ANALYTICS=1 VSA_SEED_PROJECT_ID=${PROJECT_ID} bundle exec rake db:seed_fu
4. Navigate to VSA for the owning group of the project created: Analyze > Value stream analytics
5. Validate that the Tasks by type chart (bottom of the Overview tab) works with different labels/Merge requests

Via storybook

1. yarn storybook:start
2. Navigate to the type of work charts story: http://localhost:9002/?path=/story/ee-analytics-cycle-analytics-components-type-of-work-charts--default
3. Verify that the stories render with meaningful data

Related to #492101 (closed)