Update metamodel after eMoflon data type fix

[maxkratz]

I've created and described an issue with the comparison of data types with the eMoflon GT engine: eMoflon/emoflon-ibex#408.
After the issue is fixed, adapt all metamodels in this framework.

Alternative: Use type double for all attributes within the metamodel.

[maxkratz]

This affects the following GT rule files:

https://github.com/maxkratz/iflye/blob/main/network.model.rules/src/network/model/rules/embeddingRules.gt

https://github.com/maxkratz/iflye/tree/main/network.model.rules.vnet/src/network/model/rules/vnet

https://github.com/maxkratz/iflye/blob/main/network.model.rules.racka/src/network/model/rules/racka/Rules.gt

https://github.com/maxkratz/iflye/blob/main/network.model.rules.rackb/src/network/model/rules/rackb/Rules.gt