algod: Delete deprecated cost field in dyrun response and mapping field in sourcemap

[algochoi]

Summary

This PR deletes deprecated fields in the v2 API:

• cost field in DryrunTxnResult
• Delete mapping field from sourcemap object

Part of algorand/algorand-sdk-testing#201

Test Plan

CI Tests

[codecov]

Codecov Report

Merging #4875 (25ee88c) into master (265fd9f) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4875      +/-   ##
==========================================
- Coverage   53.94%   53.93%   -0.02%     
==========================================
  Files         425      425              
  Lines       53256    53251       -5     
==========================================
- Hits        28731    28722       -9     
  Misses      22265    22265              
- Partials     2260     2264       +4     

Impacted Files	Coverage Δ
cmd/goal/clerk.go	8.77% <ø> (+0.02%)	⬆️
daemon/algod/api/server/v2/dryrun.go	71.34% <ø> (-0.18%)	⬇️
data/transactions/logic/sourcemap.go	100.00% <100.00%> (ø)
crypto/merkletrie/trie.go	66.42% <0.00%> (-2.19%)	⬇️
crypto/merkletrie/node.go	91.62% <0.00%> (-1.87%)	⬇️
ledger/tracker.go	74.26% <0.00%> (-0.85%)	⬇️
cmd/tealdbg/debugger.go	72.69% <0.00%> (-0.81%)	⬇️
ledger/acctonline.go	78.29% <0.00%> (-0.52%)	⬇️
network/wsNetwork.go	64.74% <0.00%> (-0.18%)	⬇️
network/wsPeer.go	71.36% <0.00%> (ø)
... and 2 more

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[michaeldiamant]

@algochoi Looks appropriate on my end - thanks for bundling these algod REST API changes alongside #4847.

[ahangsu]

lgtm

[ahangsu]

oh boy, you should probably merge master to resolve the conflict in routes.go...

[algochoi]

Thanks for the bump! Re-requested for review after merging