VS: Fix /reference and /headerUnit flag table entries for v142 and v143

These flags accept values in following arguments, not immediately
appended.

Fixes: #22530
31 jobs for !6445 with vs-flags in 47 minutes and 15 seconds (queued for 5 seconds)
latest detached
Status Name Job ID Coverage
  Build
manual build:centos6-x86_64 #6051389
cmake build docker linux manual
manual build:fedora34-ninja #6051390
cmake build docker linux linux-3.17 manual
manual build:macos-x86_64-makefiles #6051392
cmake macos shell xcode-12.5 nonconcurrent manual
manual build:macos-x86_64-ninja #6051391
cmake macos shell xcode-12.5 nonconcurrent manual
passed build:windows-vs2019-x64-ninja #6051393
cmake windows shell vs2019 msvc-19.29-16.10 nonconcurrent manual

00:10:15

passed lint:codespell #6051385
cmake build docker linux

00:00:46

passed lint:debian10-iwyu #6051386
cmake build docker linux

00:01:32

passed lint:fedora34-sphinx #6051388
cmake build docker linux linux-3.17

00:03:08

passed lint:fedora34-tidy #6051387
cmake build docker linux linux-3.17

00:05:58

 
  Test
created test:fedora34-ninja #6051394
cmake docker linux linux-3.17 x11
created test:macos-x86_64-makefiles #6051396
cmake macos shell xcode-12.5 nonconcurrent
created test:macos-x86_64-ninja #6051395
cmake macos shell xcode-12.5 nonconcurrent
passed test:windows-vs2019-x64-ninja #6051397
cmake windows shell vs2019 msvc-19.29-16.10 nonconcurrent

00:12:11

 
  Test Ext
created test:cuda10.2-nvidia #6051400
cmake cuda-rt docker linux
created test:debian10-ninja #6051398
cmake build docker linux linux-3.17
created test:fedora34-makefiles #6051399
cmake build docker linux linux-3.17
created test:fedora34-ninja-multi #6051401
cmake build docker linux linux-3.17
created test:macos-x86_64-xcode #6051402
cmake macos shell xcode-12.5 concurrent
passed test:windows-vs2019-x64 #6051403
cmake windows shell vs2019 msvc-19.29-16.10 concurrent

00:23:58

 
  External
passed cdash

passed ghostflow-check-master

passed ghostflow-check-release

passed ghostflow-stager

passed cdash

passed cdash

passed cdash

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager