Bump docker/build-push-action from 5.3.0 to 6.18.0 #5826

Job	Run time
Lint	3m 7s
Unit tests with race condition detection	4m 39s
Unit Tests	5m 4s
Proxy Sanity Check	0s
Build Unsigned Snapshot	3m 31s
Performance Tests	8m 43s
Integration Tests (redhatenterprise, 9)	7m 47s
Integration Tests (alpine, 3.22)	6m 20s
Integration Tests (ubuntu, 24.04)	7m 13s
Upgrade Tests (ubuntu, 24.04)	3m 45s
Upgrade Tests (redhatenterprise, 9)	3m 45s
Load Tests	0s
Integration Tests - Official OSS Images	0s
Upgrade Tests (alpine, 3.22)	4m 20s
Integration Tests - Official Plus Images	0s
	58m 14s

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