Clean uneeded test files

[Manuthor]

No description provided.

[Copilot]

Pull Request Overview

This PR removes unneeded test files and streamlines dependency configuration and CI workflows.

• Updates Cargo.toml to pin dependencies for cosmian_findex_server and cosmian_findex_structs using a specific commit revision.
• Removes the cargo-doc job from the GitHub Actions workflow.

Reviewed Changes

Copilot reviewed 60 out of 78 changed files in this pull request and generated no comments.

File	Description
Cargo.toml	Replaces branch-based dependency references with commit revisions and includes URL updates.
.github/workflows/main_base.yml	Removes the cargo-doc job from the CI configuration.

Files not reviewed (18)

• .github/scripts/cargo_build.sh: Language not supported
• cli: Language not supported
• crate/server/src/tests/google_cse/init_kms_cse.sh: Language not supported
• test_data/access_structure.json: Language not supported
• test_data/access_structure_specifications.json: Language not supported
• test_data/certificates/another_p12/ca.crt: Language not supported
• test_data/certificates/another_p12/ca.key: Language not supported
• test_data/certificates/another_p12/ca.srl: Language not supported
• test_data/certificates/another_p12/generate.sh: Language not supported
• test_data/certificates/another_p12/intermediate.crt: Language not supported
• test_data/certificates/another_p12/intermediate.csr: Language not supported
• test_data/certificates/another_p12/intermediate.key: Language not supported
• test_data/certificates/another_p12/intermediate.srl: Language not supported
• test_data/certificates/another_p12/root.crt: Language not supported
• test_data/certificates/another_p12/root.key: Language not supported
• test_data/certificates/another_p12/server.crt: Language not supported
• test_data/certificates/another_p12/server.csr: Language not supported
• test_data/certificates/another_p12/server.key: Language not supported

Comments suppressed due to low confidence (2)

Cargo.toml:67

• Consider using the canonical GitHub URL format (https://github.com) instead of 'https://www.github.com' to maintain consistency with other dependencies.

cosmian_findex_server = { git = "https://www.github.com/Cosmian/findex-server", rev = "e5044d701b73c75a170f5ff7aaba5cadd8aaed4a" }

.github/workflows/main_base.yml:36

• Verify that the removal of the cargo-doc job is intentional; if documentation generation is still required on release builds, consider preserving or migrating this step.

-  cargo-doc: