Ensure that build tools with module-level commands in spack use
the version built as part of their build graph if one exists.
This is now also required for mesa, scons, cmake and ctest, out
of graph versions of these tools in path will not be found unless
added as an external.
This bug appeared because a new version of rocprim needs cmake
3.16, while I have 3.14 in my path I had added an external for
cmake 3.20 to the dag, but 3.14 was still used to configure
rocprim causing it to fail. As far as I can tell, all the build
tools added in build_environment.py had this problem, despite the
fact that they should have been resolving these tools by name
with a path search and find the one in the dag that way. I'm
still investigating why the path searching and Executable logic
didn't do it, but this makes three of the build systems much more
explicit, and leaves only gmake and ninja as dependencies from
out in the system while ensuring the version in the dag is used
if there is one.
The additional sqlite version is to perturb the hash of python to
work around a relocation bug which will be fixed in a subsequent
PR.
b9e57006c9