deps: update python docker tag to v3.12.6 #17852

Job	Run time
Prepare CI Run	3s
Unit Tests (lifecycle-operator, lifecycle-operator/)	4m 57s
Build Docker Image (lifecycle-operator, lifecycle-operator/)	2m 23s
Unit Tests (metrics-operator, metrics-operator/)	55s
Store tag of the built images	4s
Build Docker Image (metrics-operator, metrics-operator/)	3m 24s
Unit Tests (scheduler, scheduler/)	29s
Build Docker Image (scheduler, scheduler/)	2m 41s
Unit Tests (certificate-operator, keptn-cert-manager/)	38s
Build Docker Image (deno-runtime, runtimes/deno-runtime/)	30s
Build Docker Image (python-runtime, runtimes/python-runtime/)	59s
Build Docker Image (certificate-operator, keptn-cert-manager/)	2m 10s
Component Tests / Component Tests	2m 16s
Publish helm chart changes to charts repo	0s
Integration Tests Lifecycle / Run Chainsaw Tests	9m 28s
Integration Tests Metrics / Run Chainsaw Tests	4m 12s
End to End Tests / Run E2E Tests (lifecycle-operator, lifecycle-operator/)	2m 57s
End to End Tests / Run E2E Tests (scheduler, scheduler/)	3m 35s
Integration Tests Allowed Namespaces / Run Chainsaw Tests	3m 15s
Integration Tests Cert Manager / Run Chainsaw Tests	2m 23s
Load Tests / Run load Tests	6m 41s
Integration Tests (gates_off, cert_manager_io_off) / Run Chainsaw Tests	12m 27s
Integration Tests (gates_off, cert_manager_io_on) / Run Chainsaw Tests	12m 20s
Integration Tests (gates_on, cert_manager_io_off) / Run Chainsaw Tests	14m 0s
	1h 32m 47s

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