build,win: restore vcbuild TAG functionality

--tag needs to be set after `getnodeversion` because TAG is defined in
there when DISTTYPE is not "release", setting it before `getnodeversion`
leads to --tag not being passed down in to `configure` and
src/node_version.h setting it as `-pre` by default. This change restores
the functionality that properly sets the TAG for nightlies, rc builds
and other custom build types.

Ref: nodejs/node#17299
Ref: nodejs/abi-stable-node#289

PR-URL: nodejs/node#18031
Ref: nodejs/node#17299
Ref: nodejs/abi-stable-node#289
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: JoãReis <reis@janeasystems.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Kyle Farnung <kfarnung@microsoft.com>

vcbuild.bat

@@ -181,7 +181,6 @@ if "%target_arch%"=="arm" (
 )
 if defined config_flags     set configure_flags=%configure_flags% %config_flags%
 if defined target_arch      set configure_flags=%configure_flags% --dest-cpu=%target_arch%
-if defined TAG              set configure_flags=%configure_flags% --tag=%TAG%
 if defined engine           set configure_flags=%configure_flags% --engine=%engine%
 
 if not exist "%~dp0deps\icu" goto no-depsicu
@@ -191,6 +190,8 @@ if "%target%"=="Clean" rmdir /S /Q %~dp0deps\icu
 
 call :getnodeversion || exit /b 1
 
+if defined TAG set configure_flags=%configure_flags% --tag=%TAG%
+
 if "%target%"=="Clean" rmdir /Q /S "%~dp0%config%\node-v%FULLVERSION%-win-%target_arch%" > nul 2> nul
 
 if defined noprojgen if defined nobuild if not defined sign if not defined msi goto licensertf