On gateway/ethers, make contract calls return data from a number of configurable epochs below top of ledger

[guidiaz]

Test and upgrade related testnet stacks.

[guidiaz]

Setting new configuration parameters:

• [x] Avalanche Fuji: bridge:num_confirmations=1, gateway:interleave_blocks=0, poller:evm_finalization_secs=2
• [x] Boba Rinkeby: bridge:num_confirmations=4, gateway:interleave_blocks=4, poller:evm_finalization_secs=60
• [x] Celo Alfajores: bridge:num_confirmations=5, gateway:interleave_blocks=5, poller:evm_finalization_secs=30
• [x] Conflux Core testnet: bridge:num_confirmations=8, gateway:"latest_confirmed", poller:evm_finaliztaion_secs=120
• [x] Conflux eSpace testnet: bridge:num_confirmations=32, gateway:interleave_blocks=32, poller:evm_finalization_secs=16
• [x] Cronos testnet: bridge:num_confirmations=6, gateway:interleave_blocks=6, poller:evm_finalization_secs=36
• [x] Ethereum Goerli: bridge:num_confirmations=4, gateway:interleave_blocks=4, poller:evm_finalization_secs=90
• [x] Ethereum Rinkeby: bridge:num_confirmations=4, gateway:interleave_blocks=4, poller:evm_finalization_secs=90
• [x] Harmony Testnet/0: bridge:num_confirmations=16, gateway:interleave_blocks=16, poller:evm_finalization_secs=32
• [x] Kava Testnet: bridge:num_confirmations=6, gateway:interleave_blocks=6, poller:evm_finalization_secs=36
• [x] Kcc Testnet: bridge:num_confirmations=10, gateway:interleave_blocks=10, poller:evm_finalization_secs=30
• [x] Klaytn Testnet: bridge:num_confirmations=16, gateway:interleave_blocks=16, poller:evm_finalization_secs=16
• [x] Metis Rinkeby: bridge:num_confirmations=4, gateway:interleave_blocks=4, poller:evm_finalization_secs=48
• [x] Monbase Alpha: bridge:num_confirmations=4, gateway:interleave_blocks=4, poller:evm_finalization_secs=51
• [x] OkexChain Testnet: num_confirmations=16, gateway:interleave_blocks=16, poller:evm_finalization_secs=32
• [x] Polygon Mumbai: num_confirmations=8, gateway:interleave_blocks=8, poller:evm_finalization_secs=16
• [x] SmartBCH Amber: bridge:num_confirmations=5, gateway:interleave_blocks=5, poller:evm_finalization_secs=30

[guidiaz]

Testing new docker images:

• witnet/web3-jsonrpc-gateway:1.5.1
• witnet/price-feeds-poller:1.2.2
• witnet/rust:1.5.2

[guidiaz]

Boba Rinkeby had to be reconfigured back to 1 confirmation block on the bridge, and 0 interleave blocks on the gateway, as block numbers seem to refer to previous sync w/ L1