fix: Retry removing finalizer from pipelineruns

[tisutisu]

Description

When pipelineRuns, err := kubeadminClient.HasController.GetAllPipelineRunsForApplication(applicationName, testNamespace) returns an error, we might leak the finalizers and removing finalizer will be skipped.
Added retry mechanism to try it multiple times.

Issue ticket number and link

https://issues.redhat.com/browse/KFLUXBUGS-1133

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added meaningful description with JIRA/GitHub issue key(if applicable), for example HASSuiteDescribe("STONE-123456789 devfile source")
• I have updated labels (if needed)

[psturc]

just a few suggestions otherwise lgtm

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarCloud

[psturc]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kasemAlem, psturc

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [kasemAlem,psturc]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[psturc]

known issue
/retest-required

[psturc]

KFLUXBUGS-1135
/retest-required

[psturc]

/retest-required