Replace fe_multi_stream_test with fe_simulated_streams, a rewrite in Go

See merge request cds/advligorts!230

 * removed the C++ stream generator application and a support library

 * Changes to make all tests pass again.
 * Bug fix in generator code

 * implemented data buffer per model mode
 * implemented a admin interface
 * bumped go version to 1.15 as that is what is in buster backports
 * Reworked the build to use pkg-config again to auto detection of the include paths and libraries.

 * Change to all go except for shmem buffer access + structure definitions.
 * Done to reduce the amount and complexity of the c/c++/go interface

 * fe_simulated_stream uses shm:// or mbuf:// now as well.

Pass build information to go by way of a package config file.
Build in the source dir and output to the binary dir instead of copying to the build dir.

Does not build yet.

It now accepts all things the fe_multi_stream takes.

 * restructure code so the main logic is in a library.
 * add basic build setup for go
 * renamed the executable as go does not like non test things to end in _test.go

- Deleted support for evaluated, but never used, GSC18AI6 ADC.
- Modified rate A generator setup for CYMAC using internal ADC clock.
- ADC header file cleanup of unused defines.

awtpman: system multiplier removed in favor of model rate.

See merge request cds/advligorts!229

awgtpman: create separate testpoint client library and link daqd with it.

See merge request cds/advligorts!228

 space code to compile with new, recently added int type defs.
- removed no long used daqLibZmq.c

awgtpman: testpoint client library now works with DAQ.  Testpoint client and direct testpoint access (as from awgtpman) are now
separate source files: testpoint.c and testpoint_direct.c.  They no longer need #if to separate them during build.
DAQD testing on X1 linking to testpoint.a.  testpoint library will need to be packaged as a dev package
and linked into crtools to fully unify the awgtpman source.

- Changed DMA in DAC drivers to use PLX defines
- Removed ADC interrupt register pointers, not used.

- Moved common ADC DMA functions to new plx_9056.c (Chip that controls DMA)
- Removed redundant DMA functions from ADC drivers.

Add a simple integration testing framework to help simplify tests for the daqd and related systems.

See merge request cds/advligorts!226

 * simple process management when a test needs multiple processes
 * temp directory management (and cleanup)
 * scriptable
 * less verbose than bash

Create a python wrapper for the shmem code.

See merge request cds/advligorts!225

Fix a formating error

Fix a formating error and provide an example of reading/writing data or integrating with numpy.

mbuf_probe, awgtpman, fron end: new testpoint mbuf added

See merge request cds/advligorts!227

awgtpman, mbuf: awg and testpoints now working through new mbufs for both iop and user model.  2k models need to be tested.

mbuf_probe, awgtpman: some fixes to mbuf_probe.  awgtpman now does not care about fast vs. slow models.