entrypoint postgresql implementation

CHANGELOG:

• IMPROVEMENT: added several debug logs for db connection issues
• IMPROVEMENT: separated functions dbconnectionparser and dbdriverparser
• ENHANCEMENT: dbconnectionparser function improvements for postgresql support
• FEATURE: postgresql support in entrypoint - implemented / refactored mariadb_connect and psqldb_connect functions

Pipeline runs: base image: https://jenkins.daasi.int/view/Modular-Build-Services/job/IDP/job/shibboleth-idp-v5-build_and_deploy/357/ daasi idp image: https://jenkins.daasi.int/view/Modular-Build-Services/job/IDP/job/daasi-idp_docker_build_and_deploy/56/

deployed systems: DAASI IDPs Docker: https://idp2.daasi.de K8s: https://idp-test.k8s.daasi.de

also implemented in IBBW: https://gitlab.daasi.de/ibbw/ibbw-compose/-/merge_requests/23 https://gitlab.daasi.de/ibbw/ibbw-shibboleth-idp/-/merge_requests/16

IBBW Pipeline runs:

• compose setup: https://jenkins.daasi.int/job/IBBW-Pipeline/289 -> https://docker.ibbw.pipeline
• k8s setup: https://jenkins.daasi.int/view/Didmos/job/IBBW-DLABK8s-Deploy/253 -> https://pipeline.ibbw.daasi.de