Add OpenShift route Helm Chart parameters configuration

[rmarting]

• Breaking change? (if so, please describe the impact and migration path for existing application instances)

What changes did you make? (Give an overview)

This PR is created to support the enhacement identified in the provectus/kafka-ui-charts#4. It is an initial approach to cover that feature for OpenShift environments. This PR is a complementary for the #3777 to add the documentation of the new parameters to cover that new feature.

Is there anything you'd like reviewers to focus on?

This PR should be accepted and merged after the #3777 is merged into the master branch.

How Has This Been Tested? (put an "x" (case-sensitive!) next to an item)

• No need to
• Manually (please, describe, if necessary)
• Unit checks
• Integration checks
• Covered by existing automation

Checklist (put an "x" (case-sensitive!) next to all the items, otherwise the build will fail)

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (e.g. ENVIRONMENT VARIABLES)
• My changes generate no new warnings (e.g. Sonar is happy)
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged

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[Haarolean]

@rmarting thank you