(axis title offset saving in C file)

Introduced by commit fc5d4ce6.

The buffer tests for histograms have slightly different
rounding errors between buffered/not buffered histograms
which exceed a few epsilons, so the test fails if the
tolerances are too strict.

The test merging histogram with labels, which have been filled using SetBinContent() and ResetStats to compute the entry, fails in older ROOT versions

This reverts commit 52a910dc.

* Revert "[cxxmodules] Exclude TFormula test"

This reverts commit 6bcb2422.

* Revert "[cxxmodules] Exclude remaining tests"

This reverts commit bea06e82.

* Revert "[cxxmodules] Temporary excluding tests for cxxmodules build bot"

This reverts commit 7a3e417c.

* [cxxmodules] Enable 17 tests and exclude 3 tests

Recent change to master fixed some tests which were excluded previously,
       let's enable them again.

Renaming as requested by Lorenzo.

Fixes: [ROOT-9216](https://sft.its.cern.ch/jira/browse/ROOT-9216)

Excluded tdf012_DefinesAndFiltersAsStrings, stressvector-interpreted,
         stressmathcore-interpreted when runtime_cxxmodules is On.

This excludes tests which are failing in runtime modules nightly builds.
We want to add runtime modules bot to incrementals and PRs so that
people can fix their bugs before commiting.

Fix the configuration to find Blas and decide either to build CPU or GPU architecture. Define this in RCondifure.h

Changing option name according better option semantic/documentation cases and extending it to be more generic (supporting zlib, lz4 and lzma)

Fix a compiler warning

Fix correctly hanflying of whitespace in parameter names. Due to a bug in handling the parameter name, reconstruction a function from an expression with white space did not work

This breaks linking of the test with the error below:

Scanning dependencies of target test-veccore
[100%] Building CXX object test/CMakeFiles/test-veccore.dir/test-veccore.cxx.o
In file included from /usr/include/VecCore/Limits.h:9:0,
                 from /usr/include/VecCore/Backend/Implementation.h:5,
                 from /usr/include/VecCore/VecCore:12,
                 from /home/amadio/src/root/test/test-veccore.cxx:2:
/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/include/g++-v7/cmath:45:15:
	fatal error: math.h: No such file or directory
 #include_next <math.h>
               ^~~~~~~~

Removed in C++17. No functionality change intended.