Add e2e test for Caikit Nlp Client

[bdattoma]

This is a PR for testing https://github.com/opendatahub-io/caikit-nlp-client against models which are deployed using RHOAI single-model serving stack.

The test code was originally written in a python script in my local copy of the caikit-nlp repo for an ease and faster execution. Now I'm moving it to ods-ci.

UPDATE 21st Dec
Due to an incompatibility between the python libraries caikit-nlp-client and kfp, we cannot add the former in our poetry.toml. We have tried with engineers to relax the caikit-nlp-client dependency requirements but it breaks its functioning.
It means that I had to remove the CLI tests I previously created and replace it (check below section)

• the dependency conflict is caused by opposite requirement for protobuf library, i.e., former requires >= 4.22 while the latter requires < 4
• there is a recent draft PR upstream which would solve the issue: chore(sdk): depend on protobuf 4 in kfp and kfp-kubernetes kubeflow/pipelines#10307.
  When it gets merged, we could think of re-integrate the CLI tests

Solution

• create a Jupyter notebook to send queries to the models
• create a workbench
• upload the jupyter notebook (and the generated certificates) in the workbench
• execute the workbench
• check there are no errors

Notes

• some refactoring is applied to move model serving keywords into common resource files
• python didn't get upgrade anymore as part of this PR
• the original version of the tests in this PR can still be found on one of my branches bdattoma:caikit-py-client-pythontests

[github-advanced-security]

Robocop found more than 20 potential problems in the proposed changes. Check the Files changed tab for more details.

[bdattoma]

this one cannot be tested on CI yet for some pkg incompatibility. Will align with @aloganat

[bdattoma]

PR validation

1. caikit-nlp-client test suite: rhods-ci-pr-test/2296 PASS
2. Kserve CLI smoke: rhods-ci-pr-test/2298/ PASS
3. KServe UI smoke: rhods-ci-pr-test/2299/ PASS

[sonarqubecloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud