docs(linter): Add configuration option docs for eslint/no-labels rule.

[connorshea]

Part of #14743.

Generated docs:

## Configuration

This rule accepts a configuration object with the following properties:

### allowLoop

type: `boolean`

default: `false`

If set to `true`, this rule ignores labels which are sticking to loop statements.
Examples of **correct** code with this option set to `true`:
\```js
label:
while (true) {
break label;
}
\```


### allowSwitch

type: `boolean`

default: `false`

If set to `true`, this rule ignores labels which are sticking to switch statements.
Examples of **correct** code with this option set to `true`:
\```js
label:
switch (a) {
case 0:
break label;
}
\```

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[Copilot]

Pull Request Overview

This pull request refactors the no_labels rule configuration by moving option documentation from the rule's main documentation to the struct fields themselves. The main changes are:

• Moved allowLoop and allowSwitch configuration documentation from the macro-level doc comments to field-level doc comments with examples
• Added JsonSchema derive and #[serde(...)] attribute to support JSON Schema generation
• Added config = NoLabels to the lint declaration macro

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[codspeed-hq]

CodSpeed Performance Report

Merging #15112 will not alter performance

_{Comparing connorshea:no-labels-docs (8c531c5) with main (3fbb307)¹}

Summary

✅ 4 untouched
⏩ 33 skipped²

Footnotes

1. No successful run was found on main (2ca7387) during the generation of this report, so 3fbb307 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

2. 33 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩