alloc variant for ___tracy_announce_lockable_ctx() and ___tracy_mark_lockable_ctx()

[hadron13]

These two functions require __tracy_source_location*, however, they lack an alloc variant for usage with ___tracy_alloc_srcloc(), which introduces a problem for bindings, I am trying to update the Odin binding, and ran into this problem. The original developer of that binding abandoned the 0.11 branch because of this.