Allow testing the default rolling upgrade in MR based on label

Loic Nicollerequested to merge
allow_rolling_upgrade_test_in_mr into main

What does this MR do and why?

Add the ability to set the default values for testing rolling upgrade in MR based on label

Related reference(s)

Following slack discussion: https://sylva-projects.slack.com/archives/C04BQQANHA5/p1712586846210029

side note: this feature should be used with parsimony as it consume a lot of CAPO resources ( replica is set to 3 for cp and md for both mgmt & workload)

Test coverage

Edited by Loic Nicolle

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