Jumper insertion: modifications in DRT and ODB

[luis201420]

Fixes The-OpenROAD-Project/OpenROAD-flow-scripts#2477
It contains the modifications required to use jumper insertion in the flow.
ODB:

• Added a flag in dbNet to check if a net has jumpers in its guide.
• Added a flag in dbGuide to check if the guide is a jumper.

DRT:

• Using the dbNet flag to increase the cost of not using a guide when routing a net with a jumper.

GRT:

• Running jumper insertion in repair antenna iterations when you have new nets with a violation.

Results:
I ran a test-branch with the modifications, the reduction of diodes for sky130hd are:

• aes:
  GRT diodes: from 190 to 138
  DRT diodes: from 8 to 13
  Total diodes: from 198 to 151 (23.74%)
• chameleon:
  GRT diodes: from 429 to 108
  DRT diodes: from 38 to 108
  Total diodes: from 467 to 216 (53.75%)
• jpeg:
  GRT diodes: from 234 to 61
  DRT diodes: from 49 to 64
  Total diodes: from 283 to 125 (55.83%)
• ibex:
  GRT diodes: from 113 to 51
  DRT diodes: from 35 to 47
  Total diodes: from 148 to 98 (33.8%)
• microwatt:
  GRT diodes: from 7205 to 4163
  DRT diodes: from 1379 to 1849
  Total diodes: from 8584 to 6012 (30%)
  This design is ending with 3 antenna violations after DRT.

Future works:

• Use the dbGuide flag in DRT to increase the cost of not using guides when routing a guide.
• Improve jumper insertion to reduce the number of diodes used.

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[eder-matheus]

@luis201420 Please start a new ecure-ci run to ensure it will not break any design.

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[luis201420]

@luis201420 Please start a new ecure-ci run to ensure it will not break any design.

Ok, I ran a new secure-ci to verify the designs.

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[luis201420]

@eder-matheus I ran a secure-CI with the new updates. The results for the sky130hd/microwatt design are:

• Total diodes: from 8440 to 4818 (42.91%)
• The final number of antenna violations is reduced from 2 to 1 violation.
• The runtime increases from 3h 23min to 4h 32min.
  The reduction in the number of diodes used on average is around 45% in the public designs.