Bump docker/setup-buildx-action from 3.11.1 to 3.12.0 #6551

Job	Run time
Lint	2m 15s
Build Unsigned Snapshot	9m 36s
Unit tests with race condition detection	3m 21s
Unit Tests	3m 4s
Vulnerability Scan / Vulnerability Check	1m 22s
Cache Dependencies	-1s
Integration Tests (ubuntu, 24.04)	8m 33s
Upgrade Tests (redhatenterprise, 9)	2m 36s
Integration Tests (redhatenterprise, 9)	8m 33s
Integration Tests (alpine, 3.23)	8m 18s
Upgrade Tests (ubuntu, 24.04)	2m 33s
Performance Tests	8m 51s
Upgrade Tests (alpine, 3.22)	2m 21s
Metrics Integration Tests - Official OSS Images	0s
Integration Tests - Official OSS Images	0s
Integration Tests - Official Plus Images	0s
Load Tests	0s
Metrics Integration Tests - Official Plus Images	0s
Lint	3m 12s
Build Unsigned Snapshot	4m 37s
Unit Tests	3m 2s
Vulnerability Scan / Vulnerability Check	1m 26s
Unit tests with race condition detection	3m 25s
Cache Dependencies	-1s
Integration Tests - Official Plus Images	0s
Load Tests	0s
Integration Tests - Official OSS Images	0s
Upgrade Tests	0s
Metrics Integration Tests - Official OSS Images	0s
Performance Tests	0s
Integration Tests	0s
Metrics Integration Tests - Official Plus Images	0s
	1h 17m 3s

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