All store flow code examples should be consolidated into the same page

[daniel-prefect]

First check

• I added a descriptive title to this issue.
• I used GitHub search to find a similar request and didn't find it 😇

Describe the issue

We have a dedicated page showing how to store flow code. https://docs-3.prefect.io/3.0rc/deploy/infrastructure-concepts/store-flow-code

However, some of the other deploy docs have similar examples that need to be merged into this page.

Describe the proposed change

The following sections need to be merged into the store flow code page:

• https://docs-3.prefect.io/3.0rc/deploy/infrastructure-examples/docker#store-your-code-in-git-based-cloud-storage
• https://docs-3.prefect.io/3.0rc/deploy/infrastructure-examples/docker#store-your-code-in-cloud-provider-storage
• https://docs-3.prefect.io/3.0rc/deploy/run-flows-in-local-processes#retrieve-a-flow-from-remote-storage

Additional context

No response