Config files: make them lowercase

Changes for:
- phytest-dora config file
- rfsim-phytest-dora-106prb
- phytest-dora-106prb-usrpn300
- lte-2x2-tm1
- lte-2x2-tm2
- NSA-2x2
- 4g-rfsim-mbms-fembms
- 5grfsim-fr2-32prb
- nsa-2x2-quectel
- 5g-rfsim-24prb
- test xml