Default pattern terminology to Pattern instead of Block Pattern

[felipevelzani]

What?

This PR replaces mentions of "Block Patterns" with "Patterns" only.

Fixes #49617.

Why?

There's an inconsistency in the labeling of the Patterns — sometimes it's "Pattern" while sometimes it's "Block Patterns" — and the goal would be to fix that.

How?

I mostly searched for the mentions of "Block Patterns" and replaced them manually based on the context.

Testing Instructions

Basically, a good step would be to search for mentions of patterns in the code and see if makes sense for these contexts.

[github-actions]

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[draganescu]

LGTM!

[t-hamano]

@foosantos

In order to merge this PR, could you rebase with the latest trunk just to be sure? If the GitHub Action fails, you'll probably need to fix that too. thank you!

[Mamaduka]

It looks like PR has been stale for a while. Are there plans to continue working on this?

[github-actions]

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