feat: HTSConnector fuzz testing

[natanasow]

Description:

Hedera Token Service only works with int64 values, which means that the max number of tokens that can be represented (in 8 decimals) is about 92 million tokens:

• int64.max = 9,223,372,036,854,775,807 atomic units
• decimals 8
• max tokens: 92,233,720.36854775

On other chains, for example, Ethereum, services usually use uint256, which means much higher values can be presented. This can lead to issues in cases where protocols are porting over high liquidity from EVM chains to Hedera. We need to fuzz the HTSConnector _credit function.

Related issue(s):

Fixes #3734

Notes for reviewer:

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[github-actions]

Test Results

 18 files   -   2  237 suites   - 18   37m 3s ⏱️ - 4m 26s
629 tests ±  0  625 ✅ +  3  4 💤 ±0  0 ❌  - 3 
645 runs   - 170  641 ✅  - 165  4 💤 ±0  0 ❌  - 5 

Results for commit f1184cc. ± Comparison against base commit dbc5f68.

♻️ This comment has been updated with latest results.