[MIRROR] Bumps compile to 515 [MDB IGNORE] (#25257)

* Bumps compile to 515 (#79134)

## About The Pull Request

LSP supports it, let's GOOOOOO
I've removed the 515 tests since they're stable, alongside the libcall
wrapper. left the rustgcall wrapper cause yaknow memes
Just removed all the 515 and 514 particular define wrappers. gaming

## Changelog
🆑
server: Minimum compile version has been bumped to 515. clients still
support 514 but we're gonna start using 515 restricted features for
serverside now.
/🆑

---------

Co-authored-by: John Willard <53777086+JohnFulpWillard@ users.noreply.github.com>

* Bumps compile to 515

* Fixes a TGS regression in its API

---------

Co-authored-by: LemonInTheDark <58055496+LemonInTheDark@users.noreply.github.com>
Co-authored-by: John Willard <53777086+JohnFulpWillard@ users.noreply.github.com>
Co-authored-by: GoldenAlpharex <jerego1234@hotmail.com>

code/modules/admin/view_variables/reference_tracking.dm

@@ -26,9 +26,7 @@
 
 	var/starting_time = world.time
 
-#if DM_VERSION >= 515
 	log_reftracker("Refcount for [type]: [refcount(src)]")
-#endif
 
 	//Time to search the whole game for our ref
 	DoSearchVar(GLOB, "GLOB", search_time = starting_time) //globals