Please describe the feature you'd like to see added.

maxfeerate is a sanity check optional parameter used by clients to ensure transactions submitted to the mempool and relayed to the network by a node withsendrawtransaction, testmempoolaccept and now possibly submitpackage #28950 does not exceed the maxfeerate value.
Node will reject transactions whose fee rate is higher than maxfeerate.

maxburnamount is also a sanity check optional parameter used by sendrawtransaction now possibly submitpackage #28950 to reject all transactions with OP_RETURN outputs greater than the maxburnamount.

Should we enable passing maxburnamount and maxfeerate as startup-config options to be used by those RPC calls instead?

Is your feature related to a problem, if so please describe it.

Requested here #28950 (comment)

Describe the solution you'd like

Add startup config options maxfeerate, and maxburnamount as a sanity check for transactions entering the mempool and relayed to the network.

Describe any alternatives you've considered

No response

Please leave any additional context

No response