Deprecated Lua functions' warnings are printed every time, flooding the console

Summary

The way deprecation was handled for BizHawk's bit Lua library in 2.9 basically renders older scripts that utilize it nonfunctional without modification. Because every time you call a bit function, it will create a new warning in the console, which can lag scripts that make extensive use of these functions.

The expected behavior is that it would only warn you once per session.

This was mentioned on Discord by multiple people, and I tested it myself as well.

Edit: from Bizhawk/LuaFunctions, there's apparently a one-liner that removes the deprecation warnings for the bit library: bit = (require "migration_helpers").EmuHawk_pre_2_9_bit();. But this is probably a more general issue with how BizHawk's Lua deprecation warnings work that should be addressed.

Host env.

• BizHawk 2.9
• BizHawk 2.9.1

Start with the Lua bit library deprecation path and the migration_helpers EmuHawk_pre_2_9_bit helper referenced in the issue. Reproduce on BizHawk 2.9 or 2.9.1 with repeated bit calls, then verify warnings appear only once per session without making older scripts nonfunctional.