Ported items flags optimization from DDA

[Vollch]

Summary

SUMMARY: Infrastructure "Ported items flags optimization from DDA"

Purpose of change

Ported PRs:

• Change item::item_tags, itype::item_tags, etc. to int/str id (part 4 of #44694)  CleverRaven/Cataclysm-DDA#44823
• Replace all item flag constants with static string_ids (FINAL part 5 of #44694) CleverRaven/Cataclysm-DDA#44945
• Replace int_id<json_flag> with string_id<json_flag> (housekeeping) CleverRaven/Cataclysm-DDA#45277
• Mass-rename flag_str_id to flag_id (housekeeping) CleverRaven/Cataclysm-DDA#45516
• Trivial: fix "item description flags" test in Windows builds CleverRaven/Cataclysm-DDA#45394

Describe the solution

Everything is described in linked PRs.

Describe alternatives you've considered

Down the line of "flags rework" there will be one more big PR, i'm still considering to port that thing too before giving it a good play test. (Small things can be picked up at any moment) Ported.

Testing

Not tested at all. It compiles, runs, and seems to work. But due to amount of changes it need much better testing than i did so far. Hence the draft.

Additional context

Flags list is a bit messy. I tried to clean it up a bit - adding missing declaration\json record, and removing those one which not mentioned in BN in any form, but there's still some flags which doesn't seems to do anything at all.

[scarf005]

Before

After

built locally, ran some tests, PC didn't explode. spawned an evac shelter and waited.