update of third-party packages for v2112

Currently:

• ADIOS2-2.6.0
• CGAL-4.12.2
• ParaView-v5.9.1
• boost_1_66_0
• fftw-3.3.7
• openmpi-4.0.3
• scotch_6.1.0
• kahip-2.12

My thoughts:

• ADIOS: could probably bump to 2.7.1 (Jan 2021)
• CGAL: @andy is conservative there (been bitten badly in the past), but can try moving to the latest bugfix 4.x version (4.14.2 - Nov 2019). Cannot/should not move to 5.x since this requires c++14 and thus breaks installation on centos7, SUSE 12 etc.
• ParaView: definitely want paraview 5.10 which has our various changes in it. Currently in a release candidate stage and should be finished in time.
• boost: no opinion. openSUSE still ships with 1_66_0 as well
• fftw: 3.3.10 bugfix version
• openmpi: either 4.0.6 as bugfix for the 4.0.x or try with 4.1.1 (latest stable)
• scotch: no change
• kahip: currently at 3.11 - need to see what has improved.

@Development : Wanted to get people's opinions about updating what we bundle as ThirdParty. Do we drop shipping paraview sources anytime soon?

EDITS:

• paraview now at 5.10.0-RC2 (22 Nov)