[#929] Support ticket balance queries in morley-client and Cleveland.

Description

Problem: New RPC endpoints for querying ticket balance are introduced in Mumbai.

Solution: Add those to morley-client.

Problem: we want to be able to query ticket balances in tests.

Solution: support ticket balance queries in Cleveland. In PureM, try to emulate network as best we can.

Related issue(s)

Resolves #929 (closed)

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