use Pidfile.mkpidlock in GAP.Packages.install

[ThomasBreuer]

... in order to make sure that only one process can try to install a GAP package at the same time

(One could set different locks for different GAP packages, but GAP's PackageManager installs also dependencies, and GAP.Packages.install does not know about them.)

See oscar-system/Oscar.jl/issues/3089 and #561.

[codecov]

Codecov Report

Merging #956 (3fad71d) into master (29d6b87) will increase coverage by 0.00%.
The diff coverage is 90.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #956   +/-   ##
=======================================
  Coverage   75.79%   75.80%           
=======================================
  Files          51       51           
  Lines        4177     4178    +1     
=======================================
+ Hits         3166     3167    +1     
  Misses       1011     1011           

Files	Coverage Δ
src/packages.jl	78.02% <90.00%> (+0.24%)	⬆️

[ThomasBreuer]

Currently I get the following failures:

Julia nightly - macOS-latest

[...]
Welcome to Nemo version 0.38.2

Nemo comes with absolutely no warranty whatsoever
dyld[5702]: missing symbol called

[5702] signal 6: Abort trap: 6
in expression starting at none:1
unknown function (ip: 0x114df598e)
Allocations: 5197522 (Pool: 5177958; Big: 19564); GC: 10
etc/ci_test.sh: line 21:  5702 Abort trap: 6           ${GAP} --cover ../../coverage/JuliaExperimental.coverage tst/testall.g

Julia nightly - ubuntu-latest

[...]
Welcome to Nemo version 0.38.2

Nemo comes with absolutely no warranty whatsoever
/opt/hostedtoolcache/julia/nightly/x64/bin/julia: symbol lookup error: /home/runner/.julia/artifacts/b70a0685fd4835bd351e10a877b84342e94bd552/lib/libsingular_julia.so: undefined symbol: jl_arrayset, version JL_LIBJULIA_1.11

[benlorenz]

undefined symbol: jl_arrayset, version JL_LIBJULIA_1.11

This is known and will be resolved once there is a new libsingular_julia_jll that includes oscar-system/Singular.jl#732.

(the macos error might be the same issue, just with a less helpful error)