Fix R() when R is a BoundedRing

[thofma]

Before:

julia> B
(x <= (11, 0, 1//3))

julia> parent(B)()
ERROR: MethodError: Cannot `convert` an object of type ZZRingElem to an object of type Tuple{ZZRingElem, Int64, QQFieldElem}
The function `convert` exists, but no method is defined for this combination of argument types.
[...]

Stacktrace:
 [1] Oscar.GaloisGrp.BoundRingElem{Tuple{…}}(val::ZZRingElem, p::Oscar.GaloisGrp.BoundRing{Tuple{…}})
   @ Oscar.GaloisGrp ~/blabla/Oscar.jl/src/NumberTheory/GaloisGrp/GaloisGrp.jl:56

The Galois group code uses univariate evaluation, which we want to change in Nemocas/AbstractAlgebra.jl#1948 to use inplace operation like addmul!, which will call R().

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 84.36%. Comparing base (264490b) to head (acfd109).
Report is 74 commits behind head on master.

Files with missing lines	Patch %	Lines
src/NumberTheory/GaloisGrp/GaloisGrp.jl	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4429      +/-   ##
==========================================
+ Coverage   84.34%   84.36%   +0.02%     
==========================================
  Files         663      663              
  Lines       87788    87805      +17     
==========================================
+ Hits        74042    74076      +34     
+ Misses      13746    13729      -17     

Files with missing lines	Coverage Δ
src/NumberTheory/GaloisGrp/GaloisGrp.jl	79.50% <0.00%> (ø)

... and 5 files with indirect coverage changes

[fieker]

If it works... This is the correct idea...
Using ring confirmance will be fun as boundrings are no rings....