Support new runtime_api/rpc calls query_call_info and query_call_fee_details

[muharem]

• I'm submitting a ...

• Bug report
• Feature request
• Support request
• Other

• What is the current behavior and expected behavior?

The new rpc calls are not supported.

• What is the motivation for changing the behavior?

Calculate the weights and fees for a given Call.
Common use case is to provide a weight and calculate fees for xcm Transact operation.

More info in the origin issue:
paritytech/substrate#11665

PR introducing new runtime api calls:
paritytech/substrate#11819

Note:
Custom RPC calls are not exposed for these new runtime api calls.
state_call endpoint is supposed to be used.
Read more in origin issue.

[polkadot-js-bot]

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