ref: Remove rand Dev Dependency from ./contracts/*

[0xNeshi]

Resolves #435

PR Checklist

• Tests
• Documentation
• Changelog

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✅ Deploy Preview for contracts-stylus canceled.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.6%. Comparing base (badee40) to head (e6b88a3).
Report is 1 commits behind head on main.

Additional details and impacted files

Files with missing lines	Coverage Δ
...racts/src/token/erc1155/extensions/metadata_uri.rs	72.0% <100.0%> (-3.9%)	⬇️
...tracts/src/token/erc1155/extensions/uri_storage.rs	98.0% <100.0%> (-0.2%)	⬇️
contracts/src/token/erc721/extensions/burnable.rs	100.0% <100.0%> (ø)
...ntracts/src/token/erc721/extensions/consecutive.rs	97.9% <100.0%> (-0.1%)	⬇️
...ontracts/src/token/erc721/extensions/enumerable.rs	95.6% <100.0%> (ø)
...ntracts/src/token/erc721/extensions/uri_storage.rs	90.2% <100.0%> (-1.0%)	⬇️
contracts/src/token/erc721/mod.rs	97.0% <100.0%> (-0.2%)	⬇️

[bidzyyys]

LGTM