fix: disabled render status after serialization

[maribethb]

The basics

• I validated my changes

The details

Resolves

Fixes #7113

Proposed Changes

• Update the disabled status of a block when it is rendered
• Removed call to updateDisabled from both XML and JSON serialization, since we do it in render instead
• Added tests for XML and disabling child / neighbor blocks

Reason for Changes

• fixing bugs

Test Coverage

• Added XML test that mirrors JSON test. Confirmed that this test would have caught this bug.
• Added tests that would have caught block_svg: render isn't sync OK with the state after disable/enable ops #6988
• Manual testing in playground

Documentation

no

Additional Information

There were a couple different options listed in #7113, but this seemed the most straightforward. I'd like @BeksOmega 's input as I'm not sure if this line was removed intentionally in #7308 or if it was an oversight. If it was removed intentionally then maybe an alternative solution is better.

[BeksOmega]

Fix LGTM! My bad for missing this when migrating from render -> renderEfficiently.