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