Update quay.io/prometheus-operator/prometheus-operator Docker tag to v0.73.2

This MR contains the following updates:

Package	Type	Update	Change
quay.io/prometheus-operator/prometheus-operator (source)		patch	v0.73.1 -> v0.73.2
quay.io/prometheus-operator/prometheus-operator (source)	stage	patch	v0.73.1 -> v0.73.2

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Release Notes

prometheus-operator/prometheus-operator (quay.io/prometheus-operator/prometheus-operator)

v0.73.2: 0.73.2 / 2024-04-18

Compare Source

• [BUGFIX] Fix ScrapeClassTLSConfig nil pointer exception. #​6526
• [BUGFIX] Fix missing prometheus_operator_kubernetes_client_http_requests_total metric. #​6525

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