feat: allow banker originSend in ephemerals

[tbruyelle]

This change contains #4868 since I need to use the -send flag in maketx run to write the tests. I will rebase and target the main repo once #4868 is merged. Until this happen this PR will set be draft.

[Gno2D2]

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[codecov]

Codecov Report

❌ Patch coverage is 57.14286% with 9 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
gnovm/stdlibs/chain/banker/banker.go	36.36%	7 Missing ⚠️
gno.land/pkg/keyscli/run.go	80.00%	1 Missing and 1 partial ⚠️

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[moul]

Related #4868 (comment)