New machine type: C3 Metal

[Cyclenerd]

Machine types 'machinetypes.csv' changed

Added:

c3-highcpu-192-metal,192,False,512.00
c3-highmem-192-metal,192,False,1536.0
c3-standard-192-metal,192,False,768.00

Deleted:

Todo:

• [x] Check changes
• [x] Edit title of this issue
• [ ] Run build/skus.sh workflow to export SKUs from the Google Cloud Billing API
• [ ] Check if machine type is present in 'build/skus.db'
• [ ] Add or remove mapping in build/mapping.csv
• [ ] Add or remove the machine type in build/gcp.yml
• [ ] Add or remove the machine type with mapping in build/pricing.pl
• [ ] Check if machine type gets SUD and edit build/pricing.pl
• [ ] Create a test for machine type in t/test.sh
• [ ] Test cost calculation with machine type
• [ ] Build new pricing information file 'pricing.yml'
• [ ] Run Build action in Cyclenerd/google-cloud-compute-machine-types