viewScriptModule is not included in build unless WP_EXPERIMENTAL_MODULES is set

[SeanMcMillan]

Description

viewScriptModule is documented to be available, but a view module set using it does not build.

This may be what was referred to here: #61047

The work was originally done here: #57492

I think this line is where the issue is: https://github.com/WordPress/gutenberg/blob/trunk/packages/scripts/utils/config.js#L253
It checks the build type but this is supposed to be available for nonmodule builds, if I read this comment correctly: #57492 (comment)

Step-by-step reproduction instructions

1. Make a block with a viewScript specified in block.json
2. run build
3. look at the build directory and see that the view script was compiled
4. rm -rf build
5. change the viewScript to a viewScriptModule
6. run build
7. look at the build directory and see that the view module was not compiled

Screenshots, screen recording, code snippet

No response

Environment info

I tested this with @wordpress/scripts 28.4.0

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes