chore: bump golang from `45b4337` to `1a26d5a` in /test/image #8946

Job	Run time
Build and Test (1.27.13)	6m 41s
Build and Test (1.28.9)	6m 52s
Build and Test (1.29.4)	6m 33s
[Generator Resource Expansion] Build and Test	7m 3s
[Helm] Build and Test (3.14.1, gatekeeper-system)	5m 54s
Build and Test (1.30.0)	6m 36s
[Helm] Build and Test (3.14.1, custom-namespace)	5m 56s
	45m 35s

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