Set environment variable TAG in debug workflow

Add step to set environment variable TAG from git tags

Version bump to 4.5.7.1

Bump version to 4.5.7

Update version to 4.5.6.1

Update version to 4.5.6

Bump version to 4.5.5

Version bump to 4.5.4

Fetch translations from Transifex (bitfireAT#1638)

Bump version to 4.5.2.1

Fetch translations from Transifex