chore: bump IAVL to v0.19.5 (backport #14889)

[mergify]

This is an automatic backport of pull request #14889 done by Mergify.
Cherry-pick of 21926ee has failed:

On branch mergify/bp/release/v0.45.x/pr-14889
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	both modified:   go.mod
	both modified:   go.sum
	deleted by us:   simapp/go.mod
	deleted by us:   simapp/go.sum
	deleted by us:   tests/go.mod
	deleted by us:   tests/go.sum

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[julienrbrt]

Assigning myself this (ref #14889).
Preparing release notes and rc.

[julienrbrt]

Let's not merge, until I get it was the intention to tag smth so short after. Otherwise I will simply delete this line.

[julienrbrt]

Confirmed.