Add support for cbuild-run.yml

[TeoMahnic]

Changes in this pull request:

• Add support for CMSIS-Toolbox Run and Debug management (*.cbuild-run.yml).
  [Feature Request]: --cbuild-run target support in PyOCD subcommands Open-CMSIS-Pack/vscode-cmsis-debugger#208
• <file-path> positional argument is not required for load subcommand when using cbuild-run target.

Depends on: #1770

[TeoMahnic]

Updates in cbuild-run:

• GDB Server ports are assigned based on gdbserver node in *.cbuild-run.yml file.
• Select primary_core based on start-pname node in *.cbuild-run.yml file.
• Added method for retrieving information from output node in *.cbuild-run.yml file.
• Platform dependent default CMSIS_PACK_ROOT is used if the variable is not explicitly set.
• Added a custom CbuildRunError exception.
• File paths are normalized before use, to ensure to ensure consistent behavior across platforms.

Updates in gdbserver:

• Added port selection parameter.
• Added --reset-run option in gdbserver subcommand.
• Read pname and port mapping from cbuild-run.

[RobertRostohar]

/azp run

[azure-pipelines]

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