* use StorageDoubleMapKeyProvider in RelayerRewards

* add metrics

* clippy

* fixed alerts that have caused missing dashboards

* fix metric name

* fix metric name again

* add new metrics to the RialtoParachain <> Millau maintenance dashboard

* remove obsolete dashboard

* remove message fee

* it is compiling!

* fixes + fmt

* more cleanup

* more cleanup

* restore MessageDeliveryAndDispatchPayment since we'll need relayer rewards

* started rational relayer removal

* more removal

* removed estimate fee subcommand

* remove DispatchFeePayment

* more removals

* removed conversion rates && some metrics

* - unneeded associated type

* - OutboundMessageFee

* fix benchmarks compilation

* fmt

* test + fix benchmarks

* fix send message

* clippy

* [Complex Relayers] Deduplicate l2r and r2l logic

Signed-off-by: Serban Iorga <[email protected]>

* Renamings

* [CLI] Make bridge definitions more complete

* [CLI] Refactor relay_headers_and_messages

Signed-off-by: Serban Iorga <[email protected]>

* separate accounts for different complex relay layers

* fix clippy issue

* cleanup + expose relay accounts balance metrics

* expose messages pallet owner balance metric

* use new metrics in maintenance dashboard

* tests + use separate accounts to sign RialtoHeaders -> Millau transactions in RialtoParachain<>Millau bridge

* clippy + fmt + spellcheck

* use raw balance value if tokenDecimals property is missing

* fmt

* relay balance metrics

* convert balance to "main" tokens in balance metrics

* add balances widgets to maintenance dashboard

* refactor message relay helpers

* single standalone_metrics function

* fixed tests

* clippy + fmt

* removed commented code

* add calls tracing

* fix spelling

* cargo fmt

* -commented code

* fix build again

* post-merge build fix

* clippy + fmt