[💡 Feature]: Add spec file name to the prefix of log file names about webdriverio

[WillBrock]

This could likely be achieved if the outputFileFormat can be used for the global wdio logs. Currently it looks like that will only work for reporters logging.

[`test`, {
	outputDir              : `./logs`,
	outputFileFormat : (opts) => `${opts.spec[0].replace(`/.js|.ts/`, ``)}-test-reporter.log`,
}]

[christian-bromann]

Let's introduce this as a WebdriverIO config and have a central log file management. The function passed into the outputFileFormat should receive information about the config and a scope, e.g. the reporter or service it likes to create a config file for so that someone can craft arbitrary names for the log file. This means that if someone would provide a outputFileFormat like so: () => 'allInOne.log' all logs would be written in a central file.

[wdio-bot]

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