Overlay FS: Add fields proc.is_exe_lower_layer, fd.is_upper_layer and fd.is_lower_layer #1865

Job	Run time
paths-filter	6s
test-drivers-amd64 😇 (bundled_deps)	9m 12s
test-drivers-arm64 😇 (bundled_deps)	14m 20s
build-drivers-s390x 😁 (system_deps)	49m 31s
build-modern-bpf-skeleton	3m 2s
test-drivers-ppc64le 😁 (system_deps,custom node)	4s
test-scap-amd64 😆 (bundled_deps)	3m 15s
test-scap-arm64 😆 (bundled_deps)	5m 43s
kernel-tests-dev / test-kernels (X64)	6m 21s
kernel-tests-dev / test-kernels (ARM64)	2m 38s
build-scap-open-w-extern-bpf-skeleton	6m 34s
kernel-tests-pr-info-upload	0s
	1h 40m 46s

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