Test new snippet variables

[jrieken]

Test for: #41653, #40153
Complexity: 2

• Any OS - @gushuro
• Any OS - @chrisdias

We have new snippet variables that allow to insert date/time values and that allow to insert the current clipboard value. Make sure you can use them with normal snippets, the names of the new variables are: CLIPBOARD, CURRENT_YEAR, CURRENT_YEAR_SHORT, CURRENT_MONTH, CURRENT_DATE, CURRENT_HOUR, CURRENT_MINUTE, CURRENT_SECOND