test: Use official test API in testTopology kubernetes test
test: Use official test API in testTopology kubernetes test

`window.Sizzle()` is an implementation detail of our test suite. Replace
it with the official `ph_select()` API, which will also work correctly
with chromium (there it needs to be called with a different document
argument).

Reviewed-by: Peter <a316049dd34607c62d4611d63ab22a6454add223@redhat.com>

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