usage payment service more resilient, will continue running until funds available to pay usage fee

[moodyjon]

Fixes #3663

The WalletServerPayer was receiving asyncio.CancelledError from retriable_call() because jsonrpc_wallet_reconnect() creates a situation where the connection is totally gone.

I reworked how it handles exceptions so it tolerates ConnectionError, InsufficientFundsError without exiting prematurely.

Plan to revert 4422896 which is for push button testing.

[coveralls]

Coverage decreased (-0.09%) to 57.728% when pulling 055d5aa on moodyjon:test_single_server_payment into e10f57d on lbryio:master.

[eukreign]

i approved this but you have to remove the workflow_dispatch

[moodyjon]

workflow_dispatch removed and exception logging tweaked: 13d05d3