gha: Run go test with ubuntu 26.06 - #5201
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TestVerifyTetragonPrograms loaded the BPF objects without the BTF cache the agent initializes at load time, so bpf.HasKfunc() always returned false. That left CONFIG_ITER_NUM disabled, pushing generic_kprobe_filter_arg past the 1M-instruction verifier limit, and silently skipped the uprobe objects. Init the BTF cache and set CONFIG_ITER_NUM the way the production loader does, so the test verifies the same program variant production loads. Signed-off-by: Tam Mach <tam.mach@cilium.io>
Only generic_kprobe_filter_arg had its cel_expr references resolved, so once the uprobe objects are verified generic_uprobe_filter_arg failed with unsatisfied program references. Rewrite any program that references a cel_expr function, matching how the agent resolves them at load time. Signed-off-by: Tam Mach <tam.mach@cilium.io>
Relates: #5194 Signed-off-by: Tam Mach <tam.mach@cilium.io>
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Fixes: #5194