also fix Rawdata prices on reference run

[orichters]

The Rawdata values were not fixed on the gdx_ref in reportPrices, leading to an inconsistency. So let us do that.

Reference run (SSP2EU-NPi-AMT_2023-09-01_22.09.09)

  region variable                                             period value
1 EUR    Price|Final Energy|Buildings|ESR|Electricity|Rawdata   2005   0
2 EUR    Price|Final Energy|Buildings|ESR|Electricity|Rawdata   2010  42.5
3 EUR    Price|Final Energy|Buildings|ESR|Electricity|Rawdata   2015  47.2
4 EUR    Price|Final Energy|Buildings|ESR|Electricity|Rawdata   2020  47.4
5 EUR    Price|Final Energy|Buildings|ESR|Electricity|Rawdata   2025  46.0

Old result for policy run (SSP2EU-PkBudg500-AMT_2023-09-02_00.35.31):

  region variable                                             period value
1 EUR    Price|Final Energy|Buildings|ESR|Electricity|Rawdata   2005   0
2 EUR    Price|Final Energy|Buildings|ESR|Electricity|Rawdata   2010   0
3 EUR    Price|Final Energy|Buildings|ESR|Electricity|Rawdata   2015   0
4 EUR    Price|Final Energy|Buildings|ESR|Electricity|Rawdata   2020   0
5 EUR    Price|Final Energy|Buildings|ESR|Electricity|Rawdata   2025  50.8

New result:

  region variable                                             period value
1 EUR    Price|Final Energy|Buildings|ESR|Electricity|Rawdata   2005   0
2 EUR    Price|Final Energy|Buildings|ESR|Electricity|Rawdata   2010  42.5
3 EUR    Price|Final Energy|Buildings|ESR|Electricity|Rawdata   2015  47.2
4 EUR    Price|Final Energy|Buildings|ESR|Electricity|Rawdata   2020  47.4
5 EUR    Price|Final Energy|Buildings|ESR|Electricity|Rawdata   2025  50.8