Add unit_vfs to tests for windows/osx/linux (#4748)

Add unit_vfs to CI tests for windows/osx/linux.

---
TYPE: FEATURE
DESC: Add unit_vfs to tests for windows/osx/linux

Author: dudoslav

.github/workflows/build-windows.yml

@@ -240,6 +240,7 @@ jobs:
 
           # CMake exits with non-0 status if there are any warnings during the build, so
           cmake --build $env:BUILD_BUILDDIRECTORY\tiledb -j --target tiledb_unit --config $CMakeBuildType -- /verbosity:minimal
+          cmake --build $env:BUILD_BUILDDIRECTORY\tiledb -j --target unit_vfs --config $CMakeBuildType -- /verbosity:minimal
           cmake --build $env:BUILD_BUILDDIRECTORY\tiledb -j --target tiledb_regression --config $CMakeBuildType -- /verbosity:minimal
           cmake --build $env:BUILD_BUILDDIRECTORY\tiledb -j --target all_link_complete --config $CMakeBuildType -- /verbosity:minimal
 
@@ -279,6 +280,14 @@ jobs:
              Write-Host "Tests failed. tiledb_unit exit status: " $LastExitCocde
              $host.SetShouldExit($LastExitCode)
           }
+          
+          $cmds = "$env:BUILD_BUILDDIRECTORY\tiledb\tiledb\sm\filesystem\test\$CMakeBuildType\unit_vfs -d=yes"
+          Write-Host "cmds: '$cmds'"
+          Invoke-Expression $cmds
+          if ($LastExitCode -ne 0) {
+             Write-Host "Tests failed. tiledb_vfs exit status: " $LastExitCocde
+             $host.SetShouldExit($LastExitCode)
+          }
 
           $cmds = "$env:BUILD_BUILDDIRECTORY\tiledb\test\ci\$CMakeBuildType\test_assert.exe -d=yes"
           Invoke-Expression $cmds

.github/workflows/ci-linux_mac.yml

@@ -191,6 +191,7 @@ jobs:
           ./tiledb/test/regression/tiledb_regression -d yes
           ./tiledb/test/ci/test_assert -d yes
           ./tiledb/test/tiledb_unit -d yes | awk '/1: ::set-output/{sub(/.*1: /, ""); print; next} 1'
+          ./tiledb/tiledb/sm/filesystem/test/unit_vfs -d yes | awk '/1: ::set-output/{sub(/.*1: /, ""); print; next} 1'
 
           ###################################################
           # Stop helper processes, if applicable

scripts/ci/build_libtiledb.sh

@@ -38,5 +38,6 @@ make -C tiledb install
 ls -la
 
 make -j4 -C tiledb tiledb_unit
+make -j4 -C tiledb unit_vfs
 make -j4 -C tiledb tiledb_regression
 make -j4 -C tiledb all_link_complete