[cbuild2cmake] Create toolchain configuration yml files to replace cmake files

[brondani]

https://github.com/brondani/devtools/blob/proposals/cmakelists/v0.9.3/tools/projmgr/docs/CMakeListsProposal/CMakeListsProposal.md#4-simplifying-toolchain-configuration

<toolchain>.<version>.cmake files:
https://github.com/Open-CMSIS-Pack/devtools/tree/main/tools/buildmgr/cbuildgen/config