Update coreum upgrade binary to v3.0.3.

[dzmitryhil]

Description

Update coreum upgrade binary to v3.0.3.
Remove redundant/legacy upgrades.

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 ✅

Project coverage is 36.84%. Comparing base (aa9144d) to head (459681f).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #809      +/-   ##
==========================================
+ Coverage   36.82%   36.84%   +0.02%     
==========================================
  Files         171      165       -6     
  Lines       48543    48383     -160     
==========================================
- Hits        17875    17827      -48     
+ Misses      27295    27189     -106     
+ Partials     3373     3367       -6     

Flag	Coverage Δ
coreum	32.46% <ø> (+<0.01%)	⬆️
coreum-integration-tests-modules	22.86% <ø> (-0.03%)	⬇️

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[miladz68]

Reviewed 11 of 12 files at r1, 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @masihyeganeh, @wojtek-coreum, and @ysv)

[miladz68]

Reviewed 3 of 3 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @masihyeganeh, @wojtek-coreum, and @ysv)

[masihyeganeh]

Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @wojtek-coreum and @ysv)

[ysv]

Reviewed 9 of 12 files at r1, 3 of 3 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @wojtek-coreum)