Integrate codecov into integration-tests/modules

[ysv]

Description

Reviewers checklist:

• Try to write more meaningful comments with clear actions to be taken.
• Nit-picking should be unblocking. Focus on core issues.

Authors checklist

• Provide a concise and meaningful description
• Review the code yourself first, before making the PR.
• Annotate your PR in places that require explanation.
• Think and try to split the PR to smaller PR if it is big.

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This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a2f48c6) 33.05% compared to head (0a112be) 36.26%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #777      +/-   ##
==========================================
+ Coverage   33.05%   36.26%   +3.21%     
==========================================
  Files         171      172       +1     
  Lines       48280    48299      +19     
==========================================
+ Hits        15957    17515    +1558     
+ Misses      29294    27526    -1768     
- Partials     3029     3258     +229     

Flag	Coverage Δ
coreum	33.05% <ø> (?)
coreum-integration-tests-modules	18.07% <ø> (?)

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[wojtek-coreum]

Reviewed 3 of 4 files at r1, 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @dzmitryhil and @miladz68)

[dzmitryhil]

Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @miladz68)

[ysv]

Reviewable status: 0 of 6 files reviewed, all discussions resolved (waiting on @miladz68 and @wojtek-coreum)

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build/go.mod line 3 at r2 (raw file):

module github.com/CoreumFoundation/coreum/build

// 1.20 is used here because still not all distros deliver 1.21.

@wojtek-coreum this comment is not relevant here so I removed it

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build/go.mod line 21 at r3 (raw file):

	github.com/spf13/pflag v1.0.5 // indirect
	go.uber.org/multierr v1.11.0 // indirect
	// Make sure to not bump x/exp dependency without cosmos-sdk updated because their breaking change is not compatible

@miladz68 @wojtek-coreum @dzmitryhil pls note this
otherwise weird build failure happens because when you update almost any dep x/exp also gets updated

[wojtek-coreum]

Reviewed 6 of 6 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @miladz68)

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build/go.mod line 3 at r2 (raw file):

Previously, ysv (Yaroslav Savchuk) wrote…

@wojtek-coreum this comment is not relevant here so I removed it

or you might update it to 1.21 is used ...

[dzmitryhil]

Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @miladz68)