Konflux build pipeline service account migration

[red-hat-konflux]

Build pipeline Service Account migration

This PR changes Service Account used by build pipeline from "appstudio-pipeline" to dedicated to the Component Service Account.
Please merge the Service Account update to avoid broken builds when deprected "appstudio-pipeline" Service Account is removed.

[openshift-ci]

Hi @red-hat-konflux[bot]. Thanks for your PR.

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[mbaldessari]

/ok-to-test

[mbaldessari]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mbaldessari, red-hat-konflux[bot]

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[mbaldessari]

/lgtm