VS: Fix CSharp sources inside build directory

Fixes: #22104
42 jobs for !6065 with bugfix/binarydir_cslink in 42 minutes and 18 seconds (queued for 2 seconds)
latest detached
Status Job ID Name Coverage
  Build
manual #5758905
linux docker build cmake manual
build:centos6-x86_64
passed #5758902
linux docker build cmake
build:debian10-iwyu

00:02:08

manual #5758906
linux-3.17 linux docker build cmake manual
build:fedora33-ninja
passed #5758904
linux-3.17 linux docker build cmake
build:fedora33-sphinx

00:05:00

passed #5758903
linux-3.17 linux docker build cmake
build:fedora33-tidy

00:06:58

manual #5758908
nonconcurrent xcode-12.4 shell macos cmake manual
build:macos-x86_64-makefiles
manual #5758907
nonconcurrent xcode-12.4 shell macos cmake manual
build:macos-x86_64-ninja
passed #5758909
nonconcurrent msvc-19.28-16.9 vs2019 shell windows cmake manual
build:windows-vs2019-x64-ninja

00:02:58

 
  Test
created #5758910
x11 linux-3.17 linux docker cmake
test:fedora33-ninja
created #5758912
nonconcurrent xcode-12.4 shell macos cmake
test:macos-x86_64-makefiles
created #5758911
nonconcurrent xcode-12.4 shell macos cmake
test:macos-x86_64-ninja
passed #5758913
nonconcurrent msvc-19.28-16.9 vs2019 shell windows cmake
test:windows-vs2019-x64-ninja

00:05:36

 
  Test Ext
created #5758916
linux docker cuda-rt cmake
test:cuda10.2-nvidia
created #5758914
linux-3.17 linux docker build cmake
test:debian10-ninja
created #5758915
linux-3.17 linux docker build cmake
test:fedora33-makefiles
created #5758917
linux-3.17 linux docker build cmake
test:fedora33-ninja-multi
created #5758918
concurrent xcode-12.4 shell macos cmake
test:macos-x86_64-xcode
passed #5758919
concurrent msvc-19.28-16.9 vs2019 shell windows cmake
test:windows-vs2019-x64

00:26:44

 
  External
passed cdash

passed ghostflow-check-master

passed ghostflow-stager

passed cdash

passed cdash

passed cdash

passed cdash

passed cdash

passed cdash

passed cdash

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager