[Bug]: Non-test build fails when using recommended config for test coverage

[cziemkiewicz-forrester]

Describe the bug

I'm trying to implement test coverage using test-runner in a React/Vite project. I used the build configuration recommended in the docs, which works for storybook build --test. However, I started seeing issues when running builds without the --test flag.

After some debugging, I found that including the build: { test: { disabledAddons } } property seems to affect non-test builds. Specifically, when '@storybook/addon-essentials/docs' is present in the disabledAddons array, the plugin storybook:mdx-plugin doesn't load. I confirmed this using DEBUG=vite:config.

To Reproduce

https://stackblitz.com/edit/github-mmquq7-tztnhr?file=.storybook%2Fmain.ts

System

System:
    OS: macOS 12.6.2
    CPU: (8) arm64 Apple M1 Pro
    Shell: 5.8.1 - /bin/zsh
  Binaries:
    Node: 18.19.0 - ~/.nvm/versions/node/v18.19.0/bin/node
    npm: 10.3.0 - ~/dev/forr.com/web-fe-tempo/node_modules/.bin/npm <----- active
  Browsers:
    Chrome: 98.0.4758.80
    Safari: 17.0
  npmPackages:
    @storybook/addon-a11y: ^7.6.10 => 7.6.10 
    @storybook/addon-coverage: ^1.0.0 => 1.0.0 
    @storybook/addon-designs: ^7.0.9 => 7.0.9 
    @storybook/addon-essentials: ^7.6.10 => 7.6.10 
    @storybook/addon-interactions: ^7.6.10 => 7.6.10 
    @storybook/addon-links: ^7.6.10 => 7.6.10 
    @storybook/blocks: ^7.6.10 => 7.6.10 
    @storybook/react: ^7.6.10 => 7.6.10 
    @storybook/react-vite: ^7.6.10 => 7.6.10 
    @storybook/test-runner: ^0.16.0 => 0.16.0 
    @storybook/testing-library: ^0.2.2 => 0.2.2 
    storybook: ^7.6.10 => 7.6.10

Additional context

No response