CI: Port Windows build to Azure Pipelines (#7757)

* CI: Port Windows build to Azure Pipelines from Appveyor

* CI: Split Windows build into scripts

* CI: Remove Appveyor

* CI: Add GitHub Release deployment to Azure Windows Build

* VCS: Add full branch name function to rpcs3_version

The STRINGIZE macro was a little awkward, and difficult to control
at configure time. Since other version information is already
included, the full branch name is now added as a function. It's
runtime instead of compile-time checking, but it seems worth it.

* CI: Overhaul Windows setup script

Previously, there was no way of forcing a re-download
of cached dependencies when they were replaced by new ones. In
addition, there was really no verification of downloads or cache.
Now, changing a few lines at the top of the file will automagically
force a cache update.

rpcs3/rpcs3_version.cpp

@@ -10,6 +10,11 @@ namespace rpcs3
 		return RPCS3_GIT_BRANCH;
 	}
 
+	std::string_view get_full_branch()
+	{
+		return RPCS3_GIT_FULL_BRANCH;
+	}
+
 	std::pair<std::string, std::string> get_commit_and_hash()
 	{
 		const auto commit_and_hash = fmt::split(RPCS3_GIT_VERSION, {"-"});