Logging during @compile_workload

[mkitti]

Inspired by julia-vscode/LanguageServer.jl#1222, we may need some specialized facilities to control log messages during precompilation.

[mkitti]

We may also need to do something about error handling during precompilation as well.

See https://discourse.julialang.org/t/vscode-julia-server-fails-precompilation/98865?u=mkitti