* CMake: Copy PDB file to OBS build directory on Debug build
All native OBS build objects also bundle the associated PDB file for
debugging and handling crash reports.
* CMake: Add post-build commands for RelWithDebInfo
Add post-build commands for the RelWithDebInfo build config. OBS
official builds use RelWithDebInfo, so we should be able to treat it as
a release config.
* CI: Disable building OBS native plugins
Use the OBS CMake flag DISABLE_PLUGINS to disable building plugins
included with OBS (including submodule plugins like obs-browser). This
should speed up builds on Windows when we have to rebuild OBS and on
Mac.
* CI: Don't clone/update OBS submodules
The only submodules presently in OBS are in its plugins, which we don't
need to build.
* CI: Use obsproject/obs-studio instead of jp9000/obs-studio
The OBS GitHub recently changed from jp9000/obs-studio to
obsproject/obs-studio, so use that instead.
* CI: Build as RelWithDebInfo instead of Release
OBS official builds are produced with RelWithDebInfo. This will produce
a PDB file for the plugin, similar to the native OBS plugins.
* CI(Windows): Build OBS if current build config doesn't exist
If OBS libs for the current build config do not exist, build OBS before
building obs-websocket.
Following the discussion of #105 the Qt version in the dependency
installation is now hardcoded to version 5.9.2, which is the same as the
main obs version for 20.1.0. Furthermore the names are changed from
osx to MacOS.
