Only compute solid blocks once

[SirYwell]

Overview

Description

SolidBlockMask previously went through all block states on construction to find all movement-blocking block states. While that doesn't take much time, it adds up as the mask is used in other places, e.g. on every click with a brush. Precalculating the values only once additionally allows us to use the information in other places where we previously called into NMS code through multiple layers of abstraction to check whether a block blocks movement.
For example operations using an angle mask can benefit from that.

### Submitter Checklist
- [x] Make sure you are opening from a topic branch (**/feature/fix/docs/ branch** (right side)) and not your main branch.
- [x] Ensure that the pull request title represents the desired changelog entry.
- [x] New public fields and methods are annotated with `@since TODO`.
- [x] I read and followed the [contribution guidelines](https://github.com/IntellectualSites/.github/blob/main/CONTRIBUTING.md).

[PierreSchwang]

untested, but looks good