refactor: use mocks for x/distribution

[facundomedica]

Description

Use mocks and move integration tests to the right directory.

Closes: #12758

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[codecov]

Codecov Report

Merging #12889 (0a84870) into main (4fe7797) will decrease coverage by 2.64%.
The diff coverage is 57.46%.

❗ Current head 0a84870 differs from pull request most recent head de4eee6. Consider uploading reports for the commit de4eee6 to get more accurate results

@@            Coverage Diff             @@
##             main   #12889      +/-   ##
==========================================
- Coverage   55.87%   53.23%   -2.65%     
==========================================
  Files         646      643       -3     
  Lines       54895    54859      -36     
==========================================
- Hits        30675    29204    -1471     
- Misses      21762    23333    +1571     
+ Partials     2458     2322     -136     

Impacted Files	Coverage Δ
baseapp/abci.go	64.09% <0.00%> (-0.33%)	⬇️
client/flags/flags.go	19.35% <0.00%> (-0.32%)	⬇️
client/rpc/status.go	66.66% <ø> (ø)
client/utils.go	34.92% <0.00%> (ø)
server/config/config.go	38.00% <0.00%> (-1.59%)	⬇️
server/rosetta/client_online.go	1.35% <0.00%> (ø)
server/swagger.go	0.00% <0.00%> (ø)
testutil/list.go	0.00% <0.00%> (ø)
types/result.go	76.74% <ø> (ø)
x/auth/tx/query.go	0.00% <ø> (ø)
... and 94 more

[julienrbrt]

lgtm, just curious why simulation tests are moving tests/integration, it does not use simapp.

[facundomedica]

lgtm, just curious why simulation tests are moving tests/integration, it does not use simapp.

We use simtestutil.Setup( which I understand should be an integration test by the ADR (https://github.com/cosmos/cosmos-sdk/blob/main/docs/architecture/adr-059-test-scopes.md#decision). Lmk if you think otherwise, I'm gonna fix the conflicts now and if we need to move those tests back I can do so :)

[facundomedica]

I suppose I need to run make rosetta-data to solve the missing test but I'm getting panic: could not create directory "data": mkdir data: no such file or directory