Add examples of specialized shape views for CMS.
Simplyfiy grammar handling.

This reverts commit 32619b03.

This reverts commit df0a9367.

This reverts commit fc656fab.

This reverts commit 25259d12.

This reverts commit 9a1e2611.

There was a bug in the dd4hep_add_test_reg function which was only taking into account the last dependency of a test when several were present.
On the way, dropped a double dependency in DDDB_clean_LONGTEST

PluginServiceV2: boost components parser, incidentally fix bug preventing parsing env variables with repeating colons

also drop deprecated rootcling options

The dependency on Persist_CLICSiD_Save_LONGTEST was missing leading to failures when running tests with "-j 32" for example

By only putting the templated code in the right place (i.e. in the header file where functions are declared), I could drop 2 useless headers and a large bunch of macros.

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