Sort out deprecations and aliases

[lgoettgens]

This needs Nemocas/Nemo.jl#1704 to be available, and the Nemo compat to be adapted accordingly.

This is an approach to sort deprecations and aliases as discussed with @fingolfin and already started in Nemocas/AbstractAlgebra.jl#1537 and Nemocas/Nemo.jl#1704.
There are some workarounds added to make this non-breaking for Oscar 1.0, that should get removed in the next minor release.

Things that have been changed:

• put all permanent aliases into aliases.jl, remove duplicates with AA (ishermitian)
• collect all deprecations in three lists in deprecations.jl (temp aliases, deprecate_bindings, and deprecations)
• no longer use path to import stuff from Nemo, instead call @include_deprecated_bindings() from both AA and Nemo. The initial problem both of these approaches fix is that types that are deprecated using @deprecate_binding are not re-exported (but should). @fingolfin and I found a macro the easiest way to execute the deprecations again in the Hecke scope (and once everything is updated in the Oscar scope as well).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 6.59%. Comparing base (8048731) to head (6af8c52).

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #1458       +/-   ##
===========================================
- Coverage   75.20%    6.59%   -68.62%     
===========================================
  Files         354      354               
  Lines      112687   112530      -157     
===========================================
- Hits        84746     7416    -77330     
- Misses      27941   105114    +77173     

Files	Coverage Δ
src/Deprecations.jl	33.33% <100.00%> (+33.33%)	⬆️
src/Hecke.jl	32.48% <ø> (-11.14%)	⬇️

... and 313 files with indirect coverage changes

[lgoettgens]

Bump @thofma.
If there are any concerns with this please let me know. It would be great to get this out in a non-breaking release before the large chain of breaking releases reaches Hecke, to make the handling downstream a bit easier, and to be able to already prepare for the following breaking changes.

[lgoettgens]

Thanks for merging. Could you release this as a patch release so I can already start adapting Oscar?