Fix remove compile warnings

Context

Some changes to remove warnings.

Major modifications

• fix possibly dangling reference to a temporary in Scheduler.cpp
• fix ignoring attributes on template argument ‘int (*)(FILE*)’ in Scheduler.cpp and GraphView.cpp
• fix inlining failed for Aidge::Node::input(const Aidge::IOIndex_t) member function

changed milestone to %aidge v0.6.0

added Fix 🔥🔥 label

assigned to @pineapple

enabled an automatic merge when all merge checks for 9a6798c4 pass

merged