Opensource (tools) tests as part of runtime

- Most of tools/* have been moved to the new packages/runtime/tests. (Excludes fuzz and a few things with proprietary information)

- The tools/test are now in packages/runtime/unit_tests/renderer.

- The runtime/tests are now also moved, to the following packages/runtime/unit_tests/runtime (moved the "dev/tests" to packages/runtime/unit_tests)

- Thus unit_tests comprises of runtime and renderer tests (in the future we can add more categories as folder, this avoids too many tests in one folder)

- The rendering tests and runtime tests are built together in one executable called unit_tests*. This is what is described in the rive-runtime README - it is the way our developers can test the rendering (GPU) and runtime (CPU) unit tests in one go.

- pr_runtime_tests now builds and runs all the unit_tests, previously it was only executing the runtime tests, but now it includes the renderer tests for the (same platforms still tested: windows, windows msvc, mac, linux)

- The pr_tools_tests still tests the same workloads on the same devices, limited still to the rendering tests

ISSUES:

- We cannot build all the "tools" tests (e.g. imagediff, rendering tests) with the runtime tests. The runtime tests enables TESTING. I'm also not sure if running the runtime tests on all the devices is actually is worth it - if the tests are platform+device agnostic then probably not worth it.

- Windows pr_runtime_tests switched to ws-actions/configure-aws-credentials@v1 from microsoft/setup-msbuild@v1.1, as would not build otherwise, seems related to old version of premake

TODO:

- Verify of the performance is reasonable for runner / checkins

Diffs=
f25ee97a0 Opensource (tools) tests as part of runtime (#8035)

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