[TT-1505] fix name of step used to generate changesets

[Tofel]

PR scope:

• fix changeset generation and update step name
• modify artifact name to include base_ref
• copy foundry.toml to root folder before running Slither so that all dependencies can be found (like in regular Solidity Foundry pipeline)

Tests:

• generate artifact for automation for current SHA and v2.13.0 and check if changesets are there
• generate for shared for current SHA and v2.13.0 and check if both files from root folder and shared folder are included
• check if contracts that failed to be compiled due to missing dependencies can be compiled now by Slither
• make sure artifact name contains base ref

[cl-sonarqube-production]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

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