fix: move SigBlockHeight from TxBody into AuthInfo

[0Tech]

Description

closes: #293

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[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@81bdb22). Click here to learn what that means.
The diff coverage is n/a.

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[egonspace]

LGTM

[whylee259]

Congratulations on your first PR.
I have left a minor comment, but it's LGTM.
And how about changing the title of this PR starting feat rather than fix?
This PR contains changes that required consumer actions.