fix compilation for Release-builds by sprinkling [[maybe_unused]]

[crocdialer]

compilation of 5.0 and current master fails for me, only for Release-builds:

e.g.

JoltPhysics/Build/../Jolt/Physics/Collision/Shape/Shape.h:373:140: error: unused parameter ‘inNumMaterials’ [-Werror=unused-parameter]
  373 |         virtual void                                    RestoreMaterialState([[maybe_unused]] const PhysicsMaterialRefC *inMaterials, uint inNumMaterials) { JPH_ASSERT(inNumMaterials == 0); }

debug-builds were not affected, due to JPH_ASSERT using the parameters. this PR sprinkles more [[maybe_unused]] and fixes Release-compilation for me.

using ubuntu 22.04, gcc 11.4.0

[CLAassistant]

All committers have signed the CLA.

[crocdialer]

more precisely, I'm seeing those compilation-errors in my client-code, which includes headers Jolt/Physics/Collision/Shape/Shape.h|ConvexShape.h with rather strict gcc-settings "-Wall -Wextra -Werror"

[jrouwe]

Thanks!