fix: run deal filter for offline deals

[LexLuthr]

Fixes #1047

[dirkmc]

Let's move common code into a function shared by processOfflineDealProposal and processDealProposal.

Please test this out with a local devnet and paste the results into the issue description (or as a comment)

[LexLuthr]

I tested this on devnet.

With a filter.

boost offline-deal --verified=false --provider=t01000 --commp=baga6ea4seaqpfonfro6j3gcw4uxkxbivlqn2fghx5dpulc6sbi5noz7bcvzmuiq --car-size=1175 --piece-size=2048 --payload-cid=bafk2bzacec3jst4tkh424chatp273o6rxvipfg54kphd56gaxobpcdtr2sgco --storage-price 20000000000
Error: deal proposal rejected: sh: 1: /var/lib/boost/script.sh: Permission denied

Without a filter

boost offline-deal --verified=false --provider=t01000 --commp=baga6ea4seaqpfonfro6j3gcw4uxkxbivlqn2fghx5dpulc6sbi5noz7bcvzmuiq --car-size=1175 --piece-size=2048 --payload-cid=bafk2bzacec3jst4tkh424chatp273o6rxvipfg54kphd56gaxobpcdtr2sgco --storage-price 20000000000
sent deal proposal for offline deal
  deal uuid: 4557b034-9941-4168-b3b5-0cb896e29193
  storage provider: t01000
  client wallet: t3wzwsvv3d23aqag6nfxnpao76olnoa5oom6grezs4vuo6mmi3u36jhlw33uflliwytbakn7dptz33saspjsaq
  payload cid: bafk2bzacec3jst4tkh424chatp273o6rxvipfg54kphd56gaxobpcdtr2sgco
  commp: baga6ea4seaqpfonfro6j3gcw4uxkxbivlqn2fghx5dpulc6sbi5noz7bcvzmuiq
  start epoch: 6453
  end epoch: 524853
  provider collateral: 0

[s0nik42]

I confirm that:

• it works as expected with CIDgravity for deal accepted
• REgarding the deal rejected by CIDgravity, I cannot see them in boost.

In boost :

In CIDgravity :