Tool name to object leave the s, change volume to string

[snipercup]

Summary

SUMMARY: none

Purpose of change

Contributes to #36610 and #36110

Describe the solution

Change name to object
remove name_plural
Don't add str_pl if it only adds an s
change volume to string and add 5 ml

Describe alternatives you've considered

Not changing

Testing

Some items don't stack because their ids are different

[snipercup]

The combat knives don't turn out well (combat knife +1s) but I didnt touch their json so it will have to be fixed in another pr

The knives show up normally in master, I will look into this
Actually, the combat knives and trench knives also look like this in master and will have to be fixed in another pr