Pin Gaudi to v34r1.
Fixes: Until we can support the CMake configuration introduced by gaudi/Gaudi!986 (merged), pin to the most recent version before the merge. This allows us to continue to be able to build the stack.
Fixes: Until we can support the CMake configuration introduced by gaudi/Gaudi!986 (merged), pin to the most recent version before the merge. This allows us to continue to be able to build the stack.