surelog: 1.40 -> 1.45
Update Surelog (going along with uhdm 1.45). Fix flaky tests
to to parallel execution of ctest by patching in a fix that is
already upstream.
Result zero hydra failures #199919
Also: using flatbuffers from nix environment instead of third_party/
Signed-off-by: Henner Zeller <h.zeller@acm.org>