Merge smart contract test cargo files

[masihyeganeh]

Description

Using cargo workspace to merge all the Cargo.toml files and get rid of Cargo.lock files and list dependencies in the workspace instead

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 62.45%. Comparing base (3cb186a) to head (3364581).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1059      +/-   ##
==========================================
+ Coverage   60.49%   62.45%   +1.95%     
==========================================
  Files         160      160              
  Lines       18590    18590              
==========================================
+ Hits        11246    11610     +364     
+ Misses       6240     5861     -379     
- Partials     1104     1119      +15     

Flag	Coverage Δ
coreum	57.08% <ø> (ø)
coreum-integration-tests-modules	52.56% <ø> (+6.17%)	⬆️

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[dzmitryhil]

Reviewed 31 of 31 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @miladz68 and @ysv)

[miladz68]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @masihyeganeh and @ysv)

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a discussion (no related file):
The point of this fix was to remove all cargo file except one, but here we have added one more cargo file to be maintained. this was not the intention.

[masihyeganeh]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @miladz68 and @ysv)

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a discussion (no related file):

Previously, miladz68 (milad) wrote…

The point of this fix was to remove all cargo file except one, but here we have added one more cargo file to be maintained. this was not the intention.

Yeah, this was my question to see if this adds anything to us or not. We can have one Cargo.toml file that produces many binaries, but if we are going to produce libraries, each Cargo.toml should be defined for each one.

The pros of this change is:

• having the actual dependencies in 1 file (others just point to the workspace)
• the dependencies are downloaded and cached only once for all of the projects and the target folder will be reused, so less compile time and less hard disk space, …
• all the Cargo.lock files are gone and only have 1 instead
• some common part of the Cargo.toml files moved to the parent one, so they are all shorter

The cons of this change is:

• the Cargo.toml files are not removed which seems pointless in this case

Let's discuss to keep these changes or revert them

[masihyeganeh]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @miladz68 and @ysv)

[miladz68]

Reviewed 30 of 31 files at r1, 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @ysv)