Adding Jenkinsfile for EL9

[vitodb]

Adding Jenkinsfile for EL9

[codecov[bot]]

Codecov Report

All modified lines are covered by tests :white_check_mark:

Comparison is base (9e90884) 97.13% compared to head (db79596) 97.13%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #691 +/- ## ======================================= Coverage 97.13% 97.13% ======================================= Files 51 51 Lines 3172 3172 Branches 518 518 ======================================= Hits 3081 3081 Misses 56 56 Partials 35 35 ``` | [Flag](https://app.codecov.io/gh/HEPCloud/decisionengine/pull/691/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=HEPCloud) | Coverage Δ | | |---|---|---| | [python-3.11](https://app.codecov.io/gh/HEPCloud/decisionengine/pull/691/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=HEPCloud) | `97.09% <ø> (ø)` | | | [python-3.9](https://app.codecov.io/gh/HEPCloud/decisionengine/pull/691/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=HEPCloud) | `97.09% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=HEPCloud#carryforward-flags-in-the-pull-request-comment) to find out more.

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[vitodb]

On Jenkins the pipeline stages are configured to be independent. This way they can run in parallel and also on different build nodes, this allows to get the test results quicker. Because of this each stage builds its own image locally on the build node and afterwards the image is cleaned up.