Disable / fix failing test in runincontext testing (#43663)

Disable / fix failing test in runincontext testing (#43663)

* Disable all profiler tests since they launch a secondary process
  and process launch creates an infinite event loop in the
  SocketAsyncEngine on Linux. Since runincontext loads even
  framework assemblies into the unloadable context, locals in this
  loop prevent unloading.
  The tests were working before Process.Start moved to using sockets.
* Fix the multifoldertest to work under runincontext - the shell
  script generated from the .csproj was passing an absolute path
  for the multifolder.dll to the runincontext.sh/cmd instead of
  a relative path that is used in all other tests and that the
  runincontext expects.