v0.50.0

Nemo v0.50.0

Diff since v0.49.5

This release contains no real breaking changes, apart from bumping AbstractAlgebra.jl to 0.45.0; see its changelog for the breaking changes there. The other changes in this PR may however change printing of objects and hashing, and thus may break downstream (doc-)tests; thus making this a breaking release.

Merged pull requests:

• Remove Infinity.jl that was moved to AA (#2080) (@lgoettgens)
• Bump AbstractAlgebra to 0.45 (#2082) (@lgoettgens)
• hash(::ZZRingElem) part that breaks printing (#2083) (@lgoettgens)
• Enable prepared deprecations (#2084) (@lgoettgens)
• chore: Set version to 0.50.0 (#2085) (@lgoettgens)