create a new transaction type ("new") Deploy

[piotr-dziubecki]

Original idea was to restructure the existing deploy, however, we will keep existing deploy type and create a new "transaction" type. We will deprecate the existing deploy in 2.0, remove the deprecated deploy in 3.0

Requirements:
New type: enum transactionKind which contains a set of enums (Native, NativeTransaction. This new type will then be the union of these new enums:
New Enums: Native, Userland, PricingMode
-- native: enum NativeTransaction (MintTransfer(RunTimeArgs), Auction(enum AuctionTransaction(AddBid(RunTimeArgs))) ReservationIRunTimeArgs)). -- native contracts for the chain, was session
-- Userland: enum UserlandTransaction( Noop, Closed??-- like a pure function i.e. can't call a contract, Installers/Upgraders -- called out so we can allow more space (via module_bytes), DirectCall , standard
-- standard variant is a new size of module bytes that can be much smaller than installers/upgraders.
-- install/upgrade variant is the current module byte size definition for installers/upgraders (large)
-- no more stored sessions
-- DirectCall: StoredContract, ContractByName, ContractByHash // all 4 types.... all 4 channelled in one channel
-- PricingMode: (enum slot, price, ??). -- was gas_price
deploys that do not follow a supported gas_model will not be accepted.
No dependencies field
session changing to new enum
channels defined in chainspec: channel_name - map "kind" to "lane"; types and number per block (allows us to manage block sizes, e.g. how many total installerupgraders, etc)
// prepaid reservations would be the first channel to draw transactions from; calls new native escrow procedure

Reorganize any other existing ExecutableDeployItem fields into the appropriate enum or in the transaction.

[piotr-dziubecki]

CC @MParlikar

[cspramit]

@Fraser999 this surely needs to be done

[Fraser999]

After looking into the code in a bit more depth, we've decided the first part of this epic needs to be the creation of a CEP.