ci: reenable Windows CI build with Artifactory support (#4596)

Artifactory support was added to the `nix` builds with #4556. This
extends that support to the Windows build. Now the Windows build works;
CI will build and test a Windows release build. This only affects CI and
does not change any C++ code.

* Copy the remote setup step outcome fix from #4716 discussion
* Allow the Windows job to succeed if tests fail:
  * Currently the tests do not always pass, even on a single threaded
    run on the GitHub runners. So we are using parallel runs and mark
    the test step as allowed to fail (continue-on-error).
  * At this point, it's more important that the build succeeds than that
    the tests succeed, because:
  * We've got plenty of test coverage on the other jobs.
  * Test failures are much rarer than build failures because of
    cross-platform issues.
  * Having a test failure locally doesn't interrupt a workflow nearly as
    much as a build failure.

Note that Conan Center cannot hold the binaries we need. They do not
build the configurations we need, and they will not add them.

## Future Tasks

This introduces a new bottleneck since the build and test takes over an
hour. Speed up the job by:

* Making this job run on heavy Windows runners.
* Increasing the number of hardware threads.

.github/workflows/nix.yml

@@ -88,7 +88,7 @@ jobs:
         # Print the list of dependencies that would need to be built locally.
         # A non-empty list means we have "failed" to cache binaries remotely.
         run: |
-          echo missing=$(conan info . --build missing --json 2>/dev/null  | grep '^\[') | tee ${GITHUB_OUTPUT}
+          echo missing=$(conan info . --build missing --settings build_type=${{ matrix.configuration }} --json 2>/dev/null  | grep '^\[') | tee ${GITHUB_OUTPUT}
       - name: build dependencies
         if: (steps.binaries.outputs.missing != '[]')
         uses: ./.github/actions/dependencies
@@ -146,6 +146,10 @@ jobs:
           ls ~/.conan
       - name: checkout
         uses: actions/checkout@v3
+      - name: dependencies
+        uses: ./.github/actions/dependencies
+        with:
+          configuration: ${{ matrix.configuration }}
       - name: build
         uses: ./.github/actions/build
         with: