Merge branches 'pm-opp' and 'pm-tools'

Merge OPP (operating performance points) and tooling updates for
6.11-rc1:

 - Fix missing cleanup on error in _opp_attach_genpd() (Viresh Kumar).

 - Introduce an OF helper function to inform if required-opps is used
   and drop a redundant in-parameter to _set_opp_level() (Ulf Hansson).

 - Update pm-graph to v5.12 which includes fixes and major code revamp
   for python3.12 (Todd Brandt).

 - Address several assorted issues in the cpupower utility (Roman
   Storozhenko).

* pm-opp:
  OPP: Introduce an OF helper function to inform if required-opps is used
  OPP: Drop a redundant in-parameter to _set_opp_level()
  OPP: Fix missing cleanup on error in _opp_attach_genpd()

* pm-tools:
  cpupower: fix lib default installation path
  cpupower: Disable direct build of the 'bench' subproject
  cpupower: Change the var type of the 'monitor' subcommand display mode
  cpupower: Remove absent 'v' parameter from monitor man page
  cpupower: Improve cpupower build process description
  cpupower: Add 'help' target to the main Makefile
  cpupower: Replace a dead reference link with working ones
  pm-graph: v5.12, code revamp for python3.12
  pm-graph: v5.12, fixes