DPL negotiation default algorithm

[openroad-ci]

This PR updates metrics for OR PR The-OpenROAD-Project/OpenROAD#10226 to make new negotiation legalizer algorithm into the default one.

This PR also replaces USE_NEGOTIATION for DPL_USE_OLD_DIAMOND, since the OR submodule now does not have -use_negotiation anymore for dpl, and has -use_old_diamond.

I also modified the utilization of a few failing designs.

[gemini-code-assist]

Code Review

This pull request updates the OpenROAD subproject, reduces core utilization for several designs, and renames the USE_NEGOTIATION variable to DPL_USE_OLD_DIAMOND to reflect that the negotiation legalizer is now the default. Feedback suggests removing leftover debug code in global_route.tcl and adding the stages field to the new variable definition in the configuration files for improved documentation and consistency.

[gemini-code-assist]

These lines appear to be leftover debug code. Commented-out code and explicit calls to dpl::detailed_placement_debug should be removed to keep the scripts clean and consistent with other stages (like CTS) that also perform detailed placement.

    log_cmd detailed_placement {*}$dpl_args

[gemini-code-assist]

It is recommended to include the stages field for the new DPL_USE_OLD_DIAMOND variable to document where it is used (place, cts, and grt) and to maintain consistency with other variables in this file.

  "DPL_USE_OLD_DIAMOND": {
    "default": 0,
    "description": "Use the former diamond search legalizer for detailed placement instead of the default negotiation legalizer.\n",
    "stages": [
      "place",
      "cts",
      "grt"
    ]
  },

[gemini-code-assist]

To maintain consistency with variables.json and other documented variables, consider adding the stages field here as well.

DPL_USE_OLD_DIAMOND:
  description: |
    Use the former diamond search legalizer for detailed placement instead of the default negotiation legalizer.
  default: 0
  stages:
    - place
    - cts
    - grt