Julia's Pkg currently does not work in CI workflow

[benegee]

#150 revealed an issue in the CI workflow.

When libtrixi-init-julia is invoked we get:

Install dependencies for configuration...
  Installing known registries into `~/.julia`
julia: symbol lookup error: /opt/hostedtoolcache/julia/1.9.4/x64/bin/../lib/julia/libcurl.so: undefined symbol: nghttp2_option_set_no_rfc9113_leading_and_trailing_ws_validation

• This occurs as soon as the Pkg package is used (instantiate, status, update, ...).

• It does not occur when LD_PRELOAD is emptied before. (But then we get the usual HDF5 error.)

• Since the last time the CI ran successfully, most notably julia was updated to version 1.9.4.

• Along with this, the bundled libcurl went from 4.7.0 to 4.8.0.

• The github runner has version 4.7.0 locally installed, which we load via LD_PRELOAD: /lib/x86_64-linux-gnu/libcurl.so.4.

• The new bundled libcurl version has several more nghttp2_* symbols.

• When Pkg does something, Julia loads the bundled libcurl.so using dlopen. This happens independent of any previously loaded libcurl.

• At this point both libcurl.so seem to be loaded

  julia> Libdl.dllist()
  74-element Vector{String}:
  "linux-vdso.so.1"
  "/usr/lib/x86_64-linux-gnu/libcurl.so"
  "/lib/x86_64-linux-gnu/libnghttp2.so.14"
  [...]
  "/mnt/ssd/home/bgeihe/julia-1.9.4/bin/../lib/julia/libcurl.so"
  

• The bundled libcurl contains nghttp2_* symbols which are not provided by the system libnghttp2