Draft: [3.0 backport]: Taglib: Use ID3v2Tag() instead of tag() for RIFF::WAV::File

WriteMetaToId3v2 expects a ID3v2::Tag instead of Tag, but Since TagLib v2.0, RIFF::WAV::File::tag() returns a Tag instead of ID3v2::Tag, hence replace the usage of tag() method with ID3v2Tag().

https://github.com/taglib/taglib/blob/master/taglib/riff/wav/wavfile.h#L124

Additionally, to resolve the compilation error, the function signatures of insert and removeBlock have been adjusted to align with the base class functions.

Signed-off-by: Alexandre Janniaux ajanni@videolabs.io

(cherry picked from commit ec29dfca)