Use a callable template param in `DmpCeff`

[kbieganski]

Replaces std::function in DmpCeff.cc with a callable template param. Speeds up CTS in OpenROAD by about 1-3% on ORFS designs, up to 4% on some others. Also speeds up floorplanning by about 1%.

Ibex (asap7)

Branch	Min [s]	Max [s]	Mean [s]	Relative mean	Median [s]	Relative median
baseline	99.12	99.64	99.39 ± 0.16	102%	99.41	102%
optimized	97.62	98.25	97.95 ± 0.27	100%	97.85	100%

Ibex (nangate45)

Branch	Min [s]	Max [s]	Mean [s]	Relative mean	Median [s]	Relative median
baseline	350.64	369.86	363.37 ± 8.29	102%	367.68	103%
optimized	340.50	369.86	354.89 ± 8.17	100%	357.47	100%

black_parrot (nangate45)

Branch	Min [s]	Max [s]	Mean [s]	Relative mean	Median [s]	Relative median
baseline	175.57	177.48	176.66 ± 0.74	101%	176.73	101%
optimized	171.77	176.99	175.21 ± 1.99	100%	175.76	100%

[CLAassistant]

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