openmpi: update to 4.1.1; add new variants heterogeneous and mpi1; enable use of published binaries for all compiler-specific subports

[mascguy]

Description

• Update openmpi to 4.1.1. In addition to general bug fixes, upstream also fixed Big Sur ARM builds.
• Add new variants heterogeneous and mpi1
• Enable use of published binaries for all compiler-specific subports, to match mpich
• Add lib dependency for zlib, and corresponding configure flag
• Ensure target compilers are added to depends_lib

Fixes Included:

• 62795 - openmpi: declare lib dependency on target compiler
• 62788 - openmpi: opportunistically uses zlib; add formal dependency and configure flag
• 62783 - openmpi: validate that buildbot binaries are hardware-independent
• 62214 - openmpi-default +gccdevel fails to build on aarch64 with "error: address argument to atomic operation must be a pointer to integer or pointer"
• 62070 - mpif90-openmpi-gcc10 fails to link FORTRAN program
• 59547 - openmpi-gcc9 & enable-mpi1-compatibility

Reviewers/Maintainers:

• Given the number of subports that need to be built, there's little chance that the CI jobs will complete successfully. (Though I won't complain if they do!)
• The use of published binaries has been thoroughly researched, and tested. See ticket: 62783 - openmpi: validate that buildbot binaries are hardware-independent

Type(s)

• bugfix
• enhancement
• security fix

Tested on

macOS 10.12.6 16G2136
Xcode 9.2 9C40b

macOS 10.13.6 17G14019
Xcode 10.1 10B61

macOS 10.14.6 18G103
Xcode 11.3.1 11C505

macOS 10.15.6 19G2021
Xcode 12.0 12A7209

Verification

Have you

• followed our Commit Message Guidelines?
• squashed and minimized your commits?
• checked that there aren't other open pull requests for the same change?
• referenced existing tickets on Trac with full URL?
• checked your Portfile with port lint?
• tried existing tests with sudo port test?
• tried a full install with sudo port -vst install?
• tested basic functionality of all binary files?

[mascguy]

Added fix for 62788 - openmpi: opportunistically uses zlib; add formal dependency and configure flag

[mascguy]

Added fix for 62795 - openmpi: declare lib dependency on target compiler

[mascguy]

@cjones051073/anyone, please review, and let me know if you have specific concerns. It would be great to merge this within the next day or so, for the Big Sur ARM fixes alone.