Remove MIP parsing support and update test env

[moonso]

This PR removes a module and a CLI command for parsing old mip files. The test environment is also improved by more intuitive fixtures.

Expected test outcome:

• [ ] Behaviour should be the same

Review:

• [x] code approved by @Mropat
• [x] tests executed by @moonso
• [x] "Merge and deploy" approved by @moonso Thanks for filling in who performed the code review and the test!

This version is a:

• [x] MAJOR - when you make incompatible API changes

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities (and 0 Security Hotspots to review)
2 Code Smells

No Coverage information
0.0% Duplication