[CI/CD] Run test coverage check locally

[newtork]

Context

• Run jacoco check for every clean install
• Move thresholds to pom.xml
• Remove redundant workflow step and python file
• Increase thresholds

Sample output:

mvn clean install

[...]

[INFO] --- jacoco:0.8.12:check (default-check) @ openai ---
[INFO] Loading execution data file C:\SAPDevelop\ai-sdk-java\foundation-models\openai\target\jacoco.exec
[INFO] Analyzed bundle 'openai' with 42 classes
[WARNING] Rule violated for bundle openai: instructions covered ratio is 0.74, but expected minimum is 0.79
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for SAP AI SDK - Parent POM 0.2.0-SNAPSHOT:
[INFO] 
[INFO] SAP AI SDK - Parent POM ............................ SUCCESS [  3.126 s]
[INFO] AI Core client ..................................... SUCCESS [ 31.307 s]
[INFO] Orchestration client ............................... SUCCESS [  9.072 s]
[INFO] OpenAI client ...................................... FAILURE [ 10.729 s]
[INFO] End-to-end test application ........................ SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  54.395 s
[INFO] Finished at: 2024-10-24T15:18:09+02:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.jacoco:jacoco-maven-plugin:0.8.12:check (default-check) on project openai: Coverage checks have not been met. See log for details. -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.