Add fuzz tests on master

[smiasojed]

Summary

Closes #1454

• [n] y/n | Does it introduce breaking changes?
• [n] y/n | Is it dependant on the specific version of cargo-contract or pallet-contracts?
  Add fuzz tests triggered on merge to master

Description

Add fuzz tests, and in case of failure, report a Github issue.
Fuzz tests are only executed on the master branch after merging a pull request.

Checklist before requesting a review

• [y] My code follows the style guidelines of this project
• [n] I have added an entry to CHANGELOG.md
• [y] I have commented my code, particularly in hard-to-understand areas
• [n] I have added tests that prove my fix is effective or that my feature works
• [y] Any dependent changes have been merged and published in downstream modules

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9acc3c2) 53.85% compared to head (f086e24) 53.87%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2012      +/-   ##
==========================================
+ Coverage   53.85%   53.87%   +0.01%     
==========================================
  Files         221      221              
  Lines        6957     6957              
==========================================
+ Hits         3747     3748       +1     
+ Misses       3210     3209       -1     

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[github-actions]

🦑 📈 ink! Example Contracts ‒ Changes Report 📉 🦑

These are the results when building the integration-tests/* contracts from this branch with cargo-contract and comparing them to ink! master:

Contract	Upstream Size (kB)	PR Size (kB)	Diff (kB)	Diff (%)	Change
basic-contract-caller	3.207	3.207	0	0	➖
basic-contract-caller/other-contract	1.581	1.581	0	0	➖
call-builder-return-value	8.905	8.905	0	0	➖
call-runtime	2.013	2.013	0	0	➖
conditional-compilation	1.453	1.453	0	0	➖
contract-storage	7.337	7.337	0	0	➖
contract-terminate	1.336	1.336	0	0	➖
contract-transfer	1.688	1.688	0	0	➖
custom-allocator	7.659	7.659	0	0	➖
dns	7.321	7.321	0	0	➖
e2e-call-runtime	1.302	1.302	0	0	➖
e2e-runtime-only-backend	1.879	1.879	0	0	➖
erc1155	14.134	14.134	0	0	➖
erc20	6.918	6.918	0	0	➖
erc721	9.812	9.812	0	0	➖
events	5.006	5.006	0	0	➖
flipper	1.637	1.637	0	0	➖
incrementer	1.504	1.504	0	0	➖
lang-err-integration-tests/call-builder-delegate	2.561	2.561	0	0	➖
lang-err-integration-tests/call-builder	5.087	5.087	0	0	➖
lang-err-integration-tests/constructors-return-value	1.987	1.987	0	0	➖
lang-err-integration-tests/contract-ref	4.568	4.568	0	0	➖
lang-err-integration-tests/integration-flipper	1.815	1.815	0	0	➖
lazyvec-integration-test	4.559	4.559	0	0	➖
mapping-integration-tests	7.916	7.916	0	0	➖
mother	12.786	12.786	0	0	➖
multi-contract-caller	6.155	6.155	0	0	➖
multi-contract-caller/accumulator	1.378	1.378	0	0	➖
multi-contract-caller/adder	1.908	1.908	0	0	➖
multi-contract-caller/subber	1.928	1.928	0	0	➖
multisig	21.637	21.637	0	0	➖
payment-channel	5.653	5.653	0	0	➖
sr25519-verification	1.148	1.148	0	0	➖
static-buffer	1.649	1.649	0	0	➖
trait-dyn-cross-contract-calls	2.706	2.706	0	0	➖
trait-dyn-cross-contract-calls/contracts/incrementer	1.549	1.549	0	0	➖
trait-erc20	7.294	7.294	0	0	➖
trait-flipper	1.453	1.453	0	0	➖
trait-incrementer	1.614	1.614	0	0	➖
upgradeable-contracts/delegator	3.152	3.152	0	0	➖
upgradeable-contracts/delegator/delegatee	1.613	1.613	0	0	➖
upgradeable-contracts/set-code-hash	1.747	1.747	0	0	➖
upgradeable-contracts/set-code-hash/updated-incrementer	1.726	1.726	0	0	➖
wildcard-selector	2.853	2.853	0	0	➖

Link to the run | Last update: Tue Dec 5 12:40:42 CET 2023