VS: Add special case for '-T version=14.29.16.10' under VS 16.10

Extend the table of special cases from commit 58a50a3a (VS: Fix '-T
version=14.28' under VS 16.9, 2021-03-11, v3.19.7~1^2~1).  Add a special
case for the name VS 16.11 will use for VS 16.10's default toolset, so
that it can be used with VS 16.10 too.

Using '-T version=14.29.16.10' actually works under VS 16.10 without
this change, but only because there is only one 14.29 toolset so the
two-component prefix happens to match the right one.  Make it explicit.

Issue: #21922
47 jobs for !6169 with vs-toolset-version in 29 minutes and 29 seconds (queued for 3 seconds)
latest detached
Status Job ID Name Coverage
  Build
manual #5826469
build cmake linux docker manual
build:centos6-x86_64
passed #5826466
linux docker build cmake
build:debian10-iwyu

00:05:47

manual #5826470
linux-3.17 linux docker build cmake manual
build:fedora33-ninja
passed #5826468
linux-3.17 linux docker build cmake
build:fedora33-sphinx

00:05:13

passed #5826467
linux-3.17 linux docker build cmake
build:fedora33-tidy

00:08:30

manual #5826472
nonconcurrent xcode-12.4 shell macos cmake manual
build:macos-x86_64-makefiles
manual #5826471
nonconcurrent xcode-12.4 shell macos cmake manual
build:macos-x86_64-ninja
passed #5826473
nonconcurrent msvc-19.28-16.9 vs2019 shell windows cmake manual
build:windows-vs2019-x64-ninja

00:02:52

 
  Test
created #5826474
x11 linux-3.17 linux docker cmake
test:fedora33-ninja
created #5826476
nonconcurrent xcode-12.4 shell macos cmake
test:macos-x86_64-makefiles
created #5826475
nonconcurrent xcode-12.4 shell macos cmake
test:macos-x86_64-ninja
passed #5826477
nonconcurrent msvc-19.28-16.9 vs2019 shell windows cmake
test:windows-vs2019-x64-ninja

00:15:13

 
  Test Ext
created #5826480
linux docker cuda-rt cmake
test:cuda10.2-nvidia
created #5826478
linux-3.17 linux docker build cmake
test:debian10-ninja
created #5826479
linux-3.17 linux docker build cmake
test:fedora33-makefiles
created #5826481
linux-3.17 linux docker build cmake
test:fedora33-ninja-multi
created #5826482
concurrent xcode-12.4 shell macos cmake
test:macos-x86_64-xcode
passed #5826483
concurrent msvc-19.28-16.9 vs2019 shell windows cmake
test:windows-vs2019-x64

00:10:54

 
  External
passed cdash

passed ghostflow-check-master

passed ghostflow-check-release

passed ghostflow-stager

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passed ghostflow-stager

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passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

passed ghostflow-stager

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