Disallow Inspector-v2 in Playground/Sandbox when old Babylon versions are specified

[ryantrem]

This PR fixes an issue I missed where if in Playground/Sandbox you use an older version of Babylon, things can break. This is because we don't have old versions of inspector v2 that work with old versions of Babylon like we do with inspector v1 (plus we don't have a umd package right now, so we don't even have a means of loading older versions of inspector v2).

For now with this change, we only allow Inspector v2 when using the latest Babylon (e.g. no explicit version specified).

[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:
refs/pull/17296/merge

Test environment:
https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/17296/merge/index.html

To test a playground add it to the URL, for example:

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/17296/merge/index.html#WGZLGJ#4600

Links to test babylon tools with this snapshot:

https://playground.babylonjs.com/?snapshot=refs/pull/17296/merge
https://sandbox.babylonjs.com/?snapshot=refs/pull/17296/merge
https://gui.babylonjs.com/?snapshot=refs/pull/17296/merge
https://nme.babylonjs.com/?snapshot=refs/pull/17296/merge

To test the snapshot in the playground with a playground ID add it after the snapshot query string:

https://playground.babylonjs.com/?snapshot=refs/pull/17296/merge#BCU1XR#0

[bjsplat]

You have made possible changes to the playground.
You can test the snapshot here:

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/PLAYGROUND/refs/pull/17296/merge/

The snapshot playground with the CDN snapshot (only when available):

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/PLAYGROUND/refs/pull/17296/merge/?snapshot=refs/pull/17296/merge

Note that neither Babylon scenes nor textures are uploaded to the snapshot directory, so some playgrounds won't work correctly.

[bjsplat]

You have changed file(s) that made possible changes to the sandbox.
You can test the sandbox snapshot here:

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/SANDBOX/refs/pull/17296/merge/

[bjsplat]

Interaction tests

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/17296/merge/testResults/interactionplaywright/index.html

[bjsplat]

Visualization tests for WebGPU

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/17296/merge/testResults/webgpuplaywright/index.html

[bjsplat]

Devhost visualization test reporter:

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/17296/merge/testResults/devhostplaywright/index.html

[bjsplat]

WebGL2 visualization test reporter:

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/17296/merge/testResults/webgl2playwright/index.html

[docEdub]

I'm wondering if it would be good to add a CI test for this issue. Is there an easy way to check old versions of BJS work in the playground?

[ryantrem]

I believe there are already some vis tests for showing inspector (v1). I imagine those could be updated to add more tests that try with old versions.