Remove DS pipeline endpoint hack

[DaoDaoNoCode]

JIRA: https://issues.redhat.com/browse/RHOAIENG-3782

Description

Remove the hack implemented in #2592 to insert the region to an AWS S3 endpoint.

How Has This Been Tested?

1. Create a project
2. Configure a pipeline server
3. Check the DSPA of that pipeline server, make sure the spec.objectStorage.externalStorage.host doesn't contain the region
4. Make sure the pipeline server is running

Test Impact

N/A, remove or update some tests.

Request review criteria:

Self checklist (all need to be checked):

• The developer has manually tested the changes and verified that the changes work
• Commits have been squashed into descriptive, self-contained units of work (e.g. 'WIP' and 'Implements feedback' style messages have been removed)
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has added tests or explained why testing cannot be added (unit or cypress tests for related changes)

If you have UI changes:

• Included any necessary screenshots or gifs if it was a UI change.
• Included tags to the UX team if it was a UI/UX change (find relevant UX in the SMEs section).

After the PR is posted & before it merges:

• The developer has tested their solution on a cluster by using the image produced by the PR to main

[Gkrumbach07]

verified this works
/lgtm
/approve

[openshift-ci]

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This pull-request has been approved by: Gkrumbach07

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