Add Go tests for memfd and friends #503

Job	Run time
Platform (x86_64) / Build	1m 26s
Platform (aarch64) / Build	6m 6s
Test (x86_64) / Kernel (amazonlinux2)	36m 30s
Test (x86_64) / Kernel (centos)	6m 13s
Test (x86_64) / Kernel (debian)	19m 43s
Test (x86_64) / Kernel (fedora)	9m 29s
Test (x86_64) / Kernel (mainline)	51m 57s
Test (x86_64) / Kernel (rocky)	6m 28s
Test (x86_64) / Kernel (ubuntu-aws)	1h 0m 41s
Test (x86_64) / Kernel (ubuntu-azure)	1h 1m 22s
Test (x86_64) / Kernel (ubuntu-gcp)	46m 11s
Test (x86_64) / Kernel (ubuntu-gke)	6m 15s
Test (x86_64) / Kernel (ubuntu-oem)	15m 36s
Test (x86_64) / Kernel (ubuntu-oracle)	39m 50s
Test (aarch64) / Kernel (amazonlinux2)	48m 41s
Test (aarch64) / Kernel (debian)	8m 46s
Test (aarch64) / Kernel (fedora)	12m 55s
Test (aarch64) / Kernel (mainline)	1h 9m 2s
Test (aarch64) / Kernel (rocky)	7m 50s
Test (aarch64) / Kernel (ubuntu-aws)	52m 12s
Test (aarch64) / Kernel (ubuntu-azure)	51m 39s
Test (aarch64) / Kernel (ubuntu-gcp)	12m 23s
Test (aarch64) / Kernel (ubuntu-gke)	7m 48s
Test (aarch64) / Kernel (ubuntu-oracle)	38m 40s
CI Merge Auditor	0s
	11h 17m 43s

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