Make default profile names translateable

[fin-ger]

As suggested by @MarekPikula in #160.

There are two separate approaches for this:

1. Translate profile names only when no profiles exist yet, which would be most likely during the first launch of the extension on a system
2. Translate all 4 default profiles regardless of whether the profiles existed before or not

Pros for 1:

• Existing profile names stay as they are, so users won't be confused
• Existing profiles may optionally be translated in an update dialog otherwise profile names stay as is (as pointed out in https://github.com/martin31821/cpupower/issues/164#issuecomment-930220158)

Cons for 1:

• All existing users won't benefit from this feature
• None

Pros for 2:

• All existing users would benefit from the new translation

Cons for 2:

• E.g. a german user might enter "High Performance" which would be automatically translated to "Hochleistung" although that was not the intention

Alternatives

Instead of translating the default profile names, we could leave it as is and let the users translate the profile names on their own.

[MarekPikula]

Or you could add it as an option during update process, so the user would be well aware that it's happening and could choose to opt out. I presume it would be much more work, but IMHO it would provide the best UX.

[fin-ger]

Oh right, this is I think the way to go