feat: add db_mobilenet_v3_large (TF) ckpt & benchmark

[charlesmindee]

This PR adds both checkpoints & benchmark in docs for DB with mobilenet_v3_large in TF.

Any feedback is welcome!

[fg-mindee]

Thanks!

[codecov]

Codecov Report

Merging #485 (32bbb10) into main (a73e24b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #485   +/-   ##
=======================================
  Coverage   94.99%   94.99%           
=======================================
  Files         108      108           
  Lines        4175     4175           
=======================================
  Hits         3966     3966           
  Misses        209      209           

Flag	Coverage Δ
unittests	94.99% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...etection/differentiable_binarization/tensorflow.py	97.34% <ø> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a73e24b...32bbb10. Read the comment docs.