Add coordinate transform and constant value blocks

[carolhmj]

Changes:

• New Node: Coordinate Transform (same as Node Space to Node Space from: https://docs.google.com/document/d/1MT7gL-IEn_PUw-4XGBazMxsyqsxqgAVGYcNeC4Cj_9Q/edit#heading=h.vz8ooowh7xqb)
• Constant Value

Examples:

Transform a point from box1's space to box2's space: #EMA2AF

[bjsplat]

Please make sure to label your PR with "bug", "new feature" or "breaking change" label(s).
To prevent this PR from going to the changelog marked it with the "skip changelog" label.

[bjsplat]

Snapshot stored with reference name:
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[sebavan]

mostly the GC comment and creating an issue to track down the missing nodes and good to go

[bjsplat]

Visualization tests for webgl1 have failed. If some tests failed because the snapshots do not match, the report can be found at

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If tests were successful afterwards, this report might not be available anymore.

[bjsplat]

Visualization tests for webgl2 have failed. If some tests failed because the snapshots do not match, the report can be found at

https://babylonsnapshots.z22.web.core.windows.net/refs/pull/14333/merge/testResults/webgl2/index.html

If tests were successful afterwards, this report might not be available anymore.

[sebavan]

Small one @carolhmj