Make `MatchesExcludeFilter` and `MatchesIncludeFilter` public
Make `MatchesExcludeFilter` and `MatchesIncludeFilter` public

We now make the  `MatchesExcludeFilter` and `MatchesIncludeFilter`
functions public within the notes package, because this way API
consumers can reuse this project for string matching on release notes.

We also cleanup another additional exclusion, which should not be needed
any more.

Signed-off-by: Sascha Grunert <70ab469ddb2ac3e35f32ed7c2fd1cca514b2e879@suse.com>

kubernetes/release,kubernetes/release