git is here for keeping old code, non need to polute the repository with .old files

Many were not in the right namespace, breaking argument dependent lookup, some were not even in the right file, and others not declared at all, only implemented in the .cpp
This was in particular preventing some includes (like the one og Grammar.h), in turn preventing to fix the issues with the Mac build created by pull request 611

This will break modern versions of TBB, which use std::move in their
task constructor. Further, there is little point in deleting move
constructors while allowing copy constructors.

Ever since TBB has started providing built-in CMake support in 2017 U7,
TBB_IMPORTED_TARGETS has been the only supported way to link to TBB
using CMake. In particular, the official TBB CMake files do not export
TBB_INCLUDE_DIR and TBB_LIBRARY variables.

See https://github.com/intel/tbb/blob/tbb_2020/cmake/README.rst for
more details about TBB's official CMake support.

Moved all declarations of templated method of Grammar inside Grammar.h
(instead of BasicGrammar_inl.h)
And added the missing default implementation for parse and
BasicGrammar::instance so that the defaults are complete and one does
not need to use DD4HEP_DEFINE_ macros anymroe in most cases

Allow to set ambient temperature and pressure for all materials. With examples/ClientTests/compact/Check_Air.xml -- scripts/Check_Air.py

Allow to set ambient temperature and pressure for all materials. With examples/ClientTests/compact/Check_Air.xml -- scripts/Check_Air.py

Allow to set ambient temperature and pressure for all materials. With examples/ClientTests/compact/Check_Air.xml -- scripts/Check_Air.py

Allow to set ambient temperature and pressure for all materials. With examples/ClientTests/compact/Check_Air.xml -- scripts/Check_Air.py

Allow to set ambient temperature and pressure for all materials. With examples/ClientTests/compact/Check_Air.xml -- scripts/Check_Air.py

Allow to set ambient temperature and pressure for all materials. With examples/ClientTests/compact/Check_Air.xml -- scripts/Check_Air.py

Allow to set ambient temperature and pressure for all materials. With examples/ClientTests/compact/Check_Air.xml -- scripts/Check_Air.py

Allow to set ambient temperature and pressure for all materials. With examples/ClientTests/compact/Check_Air.xml -- scripts/Check_Air.py

Allow to set ambient temperature and pressure for all materials. With examples/ClientTests/compact/Check_Air.xml -- scripts/Check_Air.py

Allow to set ambient temperature and pressure for all materials. With examples/ClientTests/compact/Check_Air.xml -- scripts/Check_Air.py