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]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci]

@red-hat-konflux[bot]: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/test-e2e-upstream-4-18	a1b26a6	link	false	/test test-e2e-upstream-4-18
ci/prow/test-e2e-upstream-4-17	a1b26a6	link	true	/test test-e2e-upstream-4-17
ci/prow/test-e2e-4-18	a1b26a6	link	false	/test test-e2e-4-18
ci/prow/test-e2e-4-17	a1b26a6	link	true	/test test-e2e-4-17

Full PR test history. Your PR dashboard.

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