Refactor tests to remove windowsJunctionsAreUsed

[maybeec]

We implemented a method called windowsJunctionsAreUsed although this method effectively just checks whether the OS is windows.
Thus, the valid proposal is to remove the method windowsJunctionsAreUsed entirely and refactor all usages accordingly by utilizing JUnit's built-in annotation @EnabledOnOs to enable the tests either for windows or especially not for windows depending on the usage of windowsJunctionsAreUsed within the test to be refactored.

Originally identified by @hohwille in #1419 (comment)

[hohwille]

@maybeec are you still planning to implement this issue?
Otherwise just remove yourself as assignee and move it back from In progress to New.

[maybeec]

@hohwille, sry I lost track of my assignment here. I will not do it today. If I grab it again, I will assign myself just before.