versioninfo: refactor and use the same code for serialization

[benlorenz]

I changed the versioninfo internals to return a dict with branchname, (full) commit, and date. This is now used for the serialization version as well.
A few small fixes/improvements including:

• improved is_dev detection since the dependency keys have type UUID
• support git worktree where .git is not a folder
• adjust whitespace to editorconfig

I changed the oscar_serialization_version to a ref that is assigned on first use via get_oscar_serialization_version(), this way we don't need to run extra subprocesses during precompilation.

There should be plenty of fail-safes in there to make sure it doesn't break anything.

fixes #2991

[thofma]

Looks good, thanks. Out of curiosity: Could we do the same with some LibGit2 magic?

[benlorenz]

Looks good, thanks. Out of curiosity: Could we do the same with some LibGit2 magic?

Yes we (probably) could but I would rather not (see also JuliaLang/Pkg.jl#2679).

There is one segfault during K3.jl I haven't seen so far for julia 1.10:

GC: pause 56.89ms. collected 364.319885MB. incr 

GC: pause 55.17ms. collected 364.076935MB. incr 

GC: pause 59.27ms. collected 363.873032MB. incr 

GC: pause 53.31ms. collected 363.090843MB. incr 

GC: pause 62.44ms. collected 360.652840MB. incr 

GC: pause 60.83ms. collected 378.091202MB. incr 

[3729] signal (11.1): Segmentation fault
in expression starting at /home/runner/work/Oscar.jl/Oscar.jl/test/AlgebraicGeometry/Schemes/K3.jl:1
jl_is_concrete_type at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/julia.h:1536 [inlined]
ijl_isa at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/subtype.c:2340
unknown function (ip: 0x7f28d0ffbaff)
Allocations: 572821182 (Pool: 572489744; Big: 331438); GC: 140
ERROR: LoadError: Package Oscar errored during testing (received signal: 11)

I would guess this disappears when retrying once the other tests are done.