[Bug] PollingSubscribeProvider used in contract confirmations might skip blocks

[dsawali]

The PollingSubscribeProvider is utilized in a couple instances internally to help poll blocks when confirming operations.

Currently there are 2 different behaviours of confirmations (Wallet and Contract).

• In Wallet operation confirmations, the PollingSubscribeProvider has a check to throw an error (MissedBlockDuringConfirmationError) when the confirmation misses/skips a block
• In Contract, the PollingSubscribeProvider does not check whether a block was missed or skipped, and would just ignore or timeout

We should make these behaviours consistent across wallet and contract. There are 2 options to what we could do to improve user experience:

• Throw a similar error in contract as we do in wallet for consistency, or
• Ensure missed/skipped blocks are refetched and returned to the user during confirmation

[Innkst]

Related issue #1050

[roxaneletourneau]

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