Implement #12699
This PR exposing Lua os.clock() api for getting the elapsed time of Lua
code execution.
Using:
```lua
local start = os.clock()
...
do something
...
local elpased = os.clock() - start
```
---------
Co-authored-by: Meir Shpilraien (Spielrein) <meir@redis.com>
Co-authored-by: Madelyn Olson <34459052+madolson@users.noreply.github.com>