refactor(x/tx): Move textual,aminojson to signing

[amaury1093]

Description

Move x/tx/{textual,aminojson} to x/tx/signing/{textual,aminojson}. This way we can have other things in x/tx, like x/tx/ante

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[amaury1093]

It seems like the liveness-test is failing because of this change:

go: cosmossdk.io/x/tx@v0.2.0 (replaced by ./x/tx): reading x/tx/go.mod: open /work/x/tx/go.mod: no such file or directory

any ideas how I can fix it?

[julienrbrt]

I believe in one of the dockerfile.

[amaury1093]

I tried 60e1d95, let's see