Update Documentation for `or_issue.py` (The-OpenROAD-Project#780)

[skip ci]

Add Jenkinsfile for OpenROAD team CI (The-OpenROAD-Project#778)

[skip ci]

Signed-off-by: Vitor Bandeira <vitor.vbandeira@gmail.com>

Move some layer variables to PDK, update io_place.py (The-OpenROAD-Pr…

…oject#767)

+ `RT_{MIN,MAX}_LAYER` added to the PDK, relies on layer names
+ `FP_IO_{H,V}LAYER` added to the PDK, relies on layer names
+ `DRT_{MIN,MAX}_LAYER` optional override variables added
~ Minimum layer set to `met1` in the PDK, you have to enable `li1` manually
~ `GLB_RT_LAYER_ADJUSTMENTS` was moved to the PDK
~ io_place.py API redone in click, now also uses layer names
- `FP_IO_{H,V}METAL` removed, will be translated to the new ones on-the-fly if they're in a user's config (for now.)
- `GLB_RT_{MIN,MAX}LAYER` and its clock equivalents deprecated, will automatically be changed to the new ones on the fly

Remove All Unused Scripts + More Consistent Script Naming (The-OpenRO…

…AD-Project#765)

* Remove Unusued Scripts

```rb
scripts = `find ./scripts -type f -maxdepth 1`.chomp.split("\n")

unused_files = []

for script in scripts
    basename = File.basename(script)
    STDERR.puts "Searching for #{basename}..."
    ag_files = `ag --count #{basename}`.chomp.split("\n")
    if ag_files.count > 0
        STDERR.puts "Found #{basename} in #{ag_files.count} files:"
        for file in ag_files
            STDERR.puts "\t-#{file}"
        end
    else
        STDERR.puts "Could not find #{basename} in any files!"
        unused_files << script
    end
end

STDERR.puts "Unused files: #{unused_files}"
puts "#{unused_files.map { |f| "'#{f}'" }.join(" ")}"
```

* Rename all `camelCase` scripts to `snake_case` for consistency (except mergeLef.py)

```rb
scripts = `find ./scripts -type f -maxdepth 1`.chomp.split("\n")

unused_files = []

for script in scripts
    if script.downcase != script
        puts script
    end
end
```

* More naming consistency, folded useless scripts

Update OpenROAD to e9d88df, update OpenROAD boost to 1.76 (The-OpenRO…

…AD-Project#762)

Rewrite `run_designs.py` (The-OpenROAD-Project#760)

+ run_designs.py now exits with exit code 2 if a design failed
~ run_designs.py rewritten in click, API altered slightly
~ renamed `addComputedStatistics` to `add_computed_statistics`
- removed `make regression_test`

Update write_sdf (The-OpenROAD-Project#748)

Improved Local Installs (The-OpenROAD-Project#744)

Local installs are now installed to a gitignored folder in the repo's file structure and use the same files as the repository.

This is a minimal flow change with no effect on the Dockerized environment. [skip ci]

Fix The-OpenROAD-Project#751 (The-OpenROAD-Project#752)

Add variable for enabling -post_cts_disable option (The-OpenROAD-Proj…

…ect#749)