Capture partial block in the components context

[23tux]

What are you trying to accomplish?

• When a component renders a partial, it's block is evaluated in the context of the __vc_original_view_context
• Because of this, inside of the block you don't have access to the component's instance

What approach did you choose and why?

I used a separate #capture for the partials block, so that it get's appended into a new OutputBuffer. This output is then caputured by the __vc_original_view_context

Anything you want to highlight for special attention from reviewers?

I'm not sure about performance here, as creating a separate OutputBuffer by using #capture is an overhead.

[markokajzer]

i can confirm this closes #2443 🎉

[doits]

👍 This probably also makes methods and variables defined attr_accessor et al available inside the block. I was just about to create an issue about this then found #2443 and this PR, glad there's a solution waiting to be merged :-)

[camertron]

Awesome, thanks for this @23tux ❤️ I believe main's tests are passing now, could you rebase and see if we can get a clean CI run on this PR?