[Version-unspecific] GAIA ReportSolvency balances consistent with specified heights

Multipartiterequested to merge
Multi/GAIA-ReportSolvency-specific-height into develop

[Version-unspecific]

Intended to close #1831 (closed)
'If possible, make GAIA MsgSolvency report the balance for the claimed chain height',
but please test with a deliberately-lagging node.

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