[💡 Feature]: allow in wdio-devtools-service coverageReporter multiple report types

Is your feature request related to a problem?

Having multiple formats of coverage reports of the same test run is very common

• HTML for test-writer
• Text std as fast check for anyone
• JSON for quality gates

NYC can do this with multiple ---reporter arguments see

But WDIO allows only one type and is not exposing the raw data, as NYC is doing it; in '.nyc_output'.

So there is no way to create another report.

Describe the solution you'd like.

// wdio.conf.js
services: [
    ['devtools', {
        coverageReporter: {
            enable: true,
            type: [ 'html', 'text' ],  // => be able to declare this
            logDir: __dirname + '/coverage'
        }
    }]
]

Describe alternatives you've considered.

Write the raw coverage results to .nyc_output. This would also enable to create multiple coverage reports.

Additional context

No response

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