Integrate Rosetta API into Launchpad.

[jgimeno]

Description

related: #7492

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer
• Review Codecov Report in the comment section below once CI passes

[codecov]

Codecov Report

Merging #7602 (4b57dbd) into launchpad/backports (2727c14) will increase coverage by 0.09%.
The diff coverage is 52.36%.

@@                   Coverage Diff                   @@
##           launchpad/backports    #7602      +/-   ##
=======================================================
+ Coverage                50.30%   50.40%   +0.09%     
=======================================================
  Files                      338      365      +27     
  Lines                    17572    18483     +911     
=======================================================
+ Hits                      8840     9316     +476     
- Misses                    7939     8272     +333     
- Partials                   793      895     +102     

Impacted Files	Coverage Δ
server/rosetta.go	0.00% <0.00%> (ø)
server/rosetta/client/tendermint/status.go	0.00% <0.00%> (ø)
server/rosetta/construction_combine.go	0.00% <0.00%> (ø)
simapp/app.go	93.15% <ø> (ø)
server/rosetta/construction_parse.go	15.78% <15.78%> (ø)
server/rosetta/launchpad.go	21.73% <21.73%> (ø)
server/rosetta/client/sdk/tx.go	22.22% <22.22%> (ø)
server/rosetta/util.go	47.78% <47.78%> (ø)
server/rosetta/client/tendermint/block.go	48.64% <48.64%> (ø)
server/rosetta/client/tendermint/info.go	50.00% <50.00%> (ø)
... and 46 more

[alessio]

Couldn't this package become a top-level one? I mean: git mv server/rosetta rosetta/

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[sahith-narahari]

@jgimeno should we close this

[tac0turtle]

From my understanding Rosetta will only be supported on 0.42 and later. If we want to support it on launchpad, please open a new pull request

[alessio]

Thanks @marbar3778. Launchpad support is no longer be worked on.