Updating reference data for better naming and reducing unit groups where possible

[conradspindler]

Currencies:

• updated currencies to the latest 2024 exchange rates as we did for our ecoinvent 3.12 release
• deleted some currencies so that only the 8 most worldwide traded currencies remain as default

Flow properties:

• renamed "Mole" to "Chemical amount" because "Mole" is the unit, "mol" is the symbol and "Chemical amount" is the physical quantity (also "Amount of substance" is the official name, but "Chemical amount" is also officially accepted and "Units of chemical amount" is a better naming than "Units of amount of substance", also users will find the flow property name "Chemical amount" more intuitive to find)
• relinked "Guest night" flow property to "Units of count" instead of previously linking it to "Units of person * time" which will be removed and merged into "Units of count" for simplicity and to reduce the number of unnecessary unit groups
• removed unneeded "Molar mass" flow property, because with the flow property "Mass" and the flow property "Chemical amount" (Mole), the property Molar mass is redundant and not needed
• renamed "Number" to "Number of entities" to have an official name for the quantity of counting positive numbers

Flows:

• added all elementary flows from the methods package 2.8.0 by importing them with "overwrite all" into the reference system, so that all flows from the methods package are compatible and included in the reference system as they appear in the latest methods package
• this step need to be synchronized more often in the future, but the elementary flows of the reference system need anyway more updates for CAS, Formula, Synonyms, Chemical amount flow property in upcoming releases

Locations:

• sorted locations more simple with less sub-folders and more descriptive folder names: "Aluminium" is now "Aluminium industry", "EU" is now "EU Member" (because the locations inside are different situations of EU member states and not the states that are in the EU in general), "UN" is now "United nations", "Oversea" is now "Oversea territories", "Country" is now "Countries", "Electricity" is now "Electricity grids", "Global" is now "Global regions"
• all folders that where in sub-folders in "Global" before are now put into the first level and "Global" becomes "Global regions" including all the global region locations from the former folder called "Custom"

Unit groups:

• "Units of mole" renamed to "Units of chemical amount" to have the right name for the physical quantity and not the unit name here
• "Units of number" renamed to "Units of count"
• "Units of number * length" renamed to "Units of count * length"
• removed "Units of mole/mass", because with the flow property "Mass" and the flow property "Chemical amount" (Mole), the property "Molar mass" and its unit group is redundant and not needed, also it is not used in any database and we added it the last time to the reference system
• removed and merged "Units of person * length" into "Units of count * length" and keeping the same UUIDs for the units included in the unit group, because "Units of counts * length" can cover person transport and item transport and vehicle transport so that only one unit group is needed for all these units
• removed and merged "Units of person * time" into "Units of count" and keeping the same UUIDs for the units included in the unit group (the only unit "guest night" in "Units of person * time" can also be in "Units of count" because it is simply a positive counting for the guest nights in hotels and removing it reduces further the amount of unnecessary unit groups with only one unit inside)

Units:

• updated currencies to the latest 2024 exchange rates as we did for our ecoinvent 3.12 release
• keeping the currencies in the "Units of currency" equal to the ones in the separate database table for currencies, so that the flow property prices and the prices in exchanges have the same exchange rates and the same default availability for the 8 worldwide most traded currencies
• adapted, removed or merged units as described under "Unit groups" while keeping the UUID for the unit if a unit is changed from one unit group to another