Lua: Targeted give_bulbs()
Was originally requested in #42502 but that ticket was closed without it. Let in multiresearch rulesets it would be possible to change a player's knowledge of a specific tech, not necessarily currently researched. Probably, some tech cost getting functions should accompany it (and client-side ones depend on #42713 decisions).
Patched, the testing API is in #45068 (that one to apply before, but not much matter)