[RG-230] Remove "Write Netlist" & "Timing Report", hide GlobalPlacement

[skyler-rs]

Motivate of the pull request

• [x] To address an existing issue. If so, please provide a link to the issue: RG-230
• [ ] Breaking new feature. If so, please describe details in the description part.

Describe the technical details

What is currently done? (Provide issue link if applicable)

• "Write Netlist" & "Timing Report" had entries in the task list but no code
• "Global Placement" has code, but should be removed for now

What does this pull request change?

• Instances of "Write Netlist" & "Timing Report" have been fully removed
• "Global Placement" code has been commented out so it can easily be restored later when it's needed
  • Compiler::GlobalPlacement() is left implemented so that there aren't any base class changes that would affect other clients. The conditional to call GlobalPlacement is commented out however.
  • Global Placement related tcl commands have been commented out
  • Help entry has been commented out

Task view after changes:

Which part of the code base require a change

• [x] Library: Compiler, Main
• [ ] Plug-in: <Specify the plugin name>
• [ ] Engine
• [ ] Documentation
• [x] Regression tests
• [ ] Continous Integration (CI) scripts

Testing

• Removed references to global_placement in:
  • tests/TestBatch/test_compiler_mt.tcl
  • tests/TestBatch/test_task_clean.tcl
• Removed references to globp in:
  • tests/TestBatch/test_compiler_batch.tcl
  • tests/TestGui/compiler_flow.tcl
  • tests/TestGui/compiler_flow_with_clean.tcl