VS: Revert "Add support for ASAN -fsanitize=address flag"

Revert commit 1b37305b (VS: Add support for ASAN -fsanitize=address
flag, 2021-04-21).  The tag `EnableASAN` is created in
`ItemDefinitionGroup` but it needs to be in `PropertyGroup`.  Revert the
mapping pending an implementation in the generator.

Issue: #21081
30 jobs for !6048 with revert-vs-asan in 6 minutes and 15 seconds (queued for 2 seconds)
latest detached
Status Job ID Name Coverage
  Build
manual #5737109
linux docker build cmake manual
build:centos6-x86_64
passed #5737106
cmake linux docker build
build:debian10-iwyu

00:03:36

manual #5737110
linux-3.17 linux docker build cmake manual
build:fedora33-ninja
passed #5737108
linux-3.17 linux docker build cmake
build:fedora33-sphinx

00:02:10

passed #5737107
linux-3.17 linux docker build cmake
build:fedora33-tidy

00:06:15

manual #5737112
nonconcurrent xcode-12.4 shell macos cmake manual
build:macos-x86_64-makefiles
manual #5737111
nonconcurrent xcode-12.4 shell macos cmake manual
build:macos-x86_64-ninja
manual #5737113
nonconcurrent msvc-19.28-16.9 vs2019 shell windows cmake manual
build:windows-vs2019-x64-ninja
 
  Test
created #5737114
x11 linux-3.17 linux docker cmake
test:fedora33-ninja
created #5737116
nonconcurrent xcode-12.4 shell macos cmake
test:macos-x86_64-makefiles
created #5737115
nonconcurrent xcode-12.4 shell macos cmake
test:macos-x86_64-ninja
created #5737117
nonconcurrent msvc-19.28-16.9 vs2019 shell windows cmake
test:windows-vs2019-x64-ninja
 
  Test Ext
created #5737120
linux docker cuda-rt cmake
test:cuda10.2-nvidia
created #5737118
linux-3.17 linux docker build cmake
test:debian10-ninja
created #5737119
linux-3.17 linux docker build cmake
test:fedora33-makefiles
created #5737121
linux-3.17 linux docker build cmake
test:fedora33-ninja-multi
created #5737122
concurrent xcode-12.4 shell macos cmake
test:macos-x86_64-xcode
created #5737123
concurrent msvc-19.28-16.9 vs2019 shell windows cmake
test:windows-vs2019-x64
 
  External
passed cdash

passed ghostflow-check-master

passed ghostflow-stager

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