Add `serverComponents.server()` to server-fns plugins when `experimental.islands` is enabled.

[jtag05]

PR Checklist

Please check if your PR fulfills the following requirements:

• [ ] Tests for the changes have been added (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• [X] Bugfix
• [ ] Feature
• [ ] Code style update (formatting, local variables)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] CI related changes
• [ ] Documentation content changes
• [ ] infrastructure changes
• [ ] Other... Please describe:

What is the current behavior?

Outlined in 1559 TL;DR production builds are not adding server action chunks when experimental.islands are enabled

What is the new behavior?

Chunks are generated as expected

Other information

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Latest commit: f340d48ee703e0cbb6f3e413679a3f6259d867b9

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[jtag05]

I'm happy to add tests as soon as I can find where they are for the config file. I felt it was best to open this and start the discussion.

[ryansolid]

Yeah its ok. This was an oversight in a sense. Like I'm not sure this will work perfectly but lets unblock and see what's broken.