Add is_invertible_with_inverse for arb matrices

[thofma]

No description provided.

[codecov]

Codecov Report

Merging #1525 (bcab3cd) into master (2dba7d8) will increase coverage by 0.02%.
Report is 2 commits behind head on master.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1525      +/-   ##
==========================================
+ Coverage   82.76%   82.79%   +0.02%     
==========================================
  Files          95       95              
  Lines       37186    37236      +50     
==========================================
+ Hits        30778    30828      +50     
  Misses       6408     6408              

Files Changed	Coverage Δ
src/arb/ComplexMat.jl	77.28% <100.00%> (+0.20%)	⬆️
src/arb/RealMat.jl	79.82% <100.00%> (+0.24%)	⬆️
src/arb/acb_mat.jl	78.13% <100.00%> (+0.19%)	⬆️
src/arb/arb_mat.jl	82.47% <100.00%> (+0.20%)	⬆️

... and 10 files with indirect coverage changes

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