[bug] from_excel allows invalid geodata to be loaded

[KS-HTK]

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Reproducible Example

import pandapower as pp
net = pp.create_empty_network("test")
coords = [(1,2),(4,5)]
pp.create_bus(net,0.4, index = 1, geodata=(1,2))
pp.create_bus(net,0.4, index = 2, geodata=(1,7))
pp.create_bus(net,0.4, index = 3, geodata=(1,7))
pp.create_bus(net,0.4, index = 4, geodata=(1,7))
pp.to_excel(net, "test.xlsx")


modify any geodata in the xlsx to `"{\"coordinates\":[[1,2], [2,3]], \"type\":\"LineString\"}"`


net = pp.from_excel("test.xlsx")
print(net.bus)

Issue Description and Traceback

When loading from excel file invalid geodata is not flaged for at least bus. Most likely for all types of elements that allow geodata.

Expected Behavior

A Warning or log message similar to using deprecated coords keyword on create_bus

Installed Versions

• python version: 3.12
• pandapower develop branch
• Operating System name/version: Win 11

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