update ledger tool to restore cost table from blockstore#18489

Merged

tao-stones merged 3 commits intosolana-labs:masterfrom tao-stones:ledger-tool-restores-cost-table-from-blockstore

Jul 8, 2021

+50-36

Commits on Jul 7, 2021

update ledger tool to restore cost model from blockstore when compute-slot-cost
tao-stones
committed
Move initialize_cost_table into cost_model, so the function can be tested and shared between validator and ledger-tool
tao-stones
committed
refactor and simplify a test
tao-stones
committed