Review raw scalars regarding naming convention

[MaGering]

We need to adjust the scalar data because for some entries the set naming does not match the one to be set according to the convention.

This is indicated by the warning that has existed since the changes made in #281:

We expected but could not find the following name(s): ['BB_B-electricity-transmission', 'B-ch4-boiler', 'BB-ch4-boiler', 'B-ch4-bpchp', 'BB-ch4-bpchp', 'B-h2-bpchp', 'BB-h2-bpchp', 'B-heat_central-constraint', 'BB-heat_central-constraint', 'B-heat_decentral-constraint', 'BB-heat_decentral-constraint'].

Names that were set by us:

• BB-B-electricity-transmission
• B-ch4-boiler_large
• BB-ch4-boiler_large
• B-ch4-boiler_small
• BB-ch4-boiler_small
• BB-ch4-bpchp
• B-ch4-bpchp
• BB-h2-bpchp
• B-h2-bpchp
• B-heat_central-gas_electricity_relation
• BB-heat_central-gas_electricity_relation
• B-heat_decentral-gas_electricity_relation
• BB-heat_decentral-gas_electricity_relation

Names that were expected according to convention: <region>-<carrier>-<tech>:

• BB_B-electricity-transmission
• B-ch4-boiler
• BB-ch4-boiler
• B-ch4-bpchp
• BB-ch4-bpchp
• B-h2-bpchp
• BB-h2-bpchp
• B-heat_central-constraint
• BB-heat_central-constraint
• B-heat_decentral-constraint
• BB-heat_decentral-constraint