ci: sync with libbpf/ci@v3

* vmtest.yml
  * use v3 of libbpf/ci actions
  * remove unnecessary selftests preparation steps
* ci/vmtest
  * remove unnecessary scripts and configs
  * add libbpf-specific run-vmtest.env [1]

[1] https://github.com/libbpf/ci/pull/166

Signed-off-by: Ihor Solodrai <ihor.solodrai@pm.me>

ci/vmtest/configs/ALLOWLIST-4.9.0

@@ -1,8 +0,0 @@
-# btf_dump -- need to disable data dump sub-tests
-core_retro
-cpu_mask
-hashmap
-legacy_printk
-perf_buffer
-section_names
-

ci/vmtest/configs/ALLOWLIST-5.5.0

@@ -1,49 +0,0 @@
-# attach_probe
-autoload
-bpf_verif_scale
-cgroup_attach_autodetach
-cgroup_attach_override
-core_autosize
-core_extern
-core_read_macros
-core_reloc
-core_retro
-cpu_mask
-endian
-get_branch_snapshot
-get_stackid_cannot_attach
-global_data
-global_data_init
-global_func_args
-hashmap
-legacy_printk
-linked_funcs
-linked_maps
-map_lock
-obj_name
-perf_buffer
-perf_event_stackmap
-pinning
-pkt_md_access
-probe_user
-queue_stack_map
-raw_tp_writable_reject_nbd_invalid
-raw_tp_writable_test_run
-rdonly_maps
-section_names
-signal_pending
-sockmap_ktls
-spinlock
-stacktrace_map
-stacktrace_map_raw_tp
-static_linked
-task_fd_query_rawtp
-task_fd_query_tp
-tc_bpf
-tcp_estats
-test_global_funcs/arg_tag_ctx*
-tp_attach_query
-usdt/urand_pid_attach
-xdp
-xdp_noinline
-xdp_perf

ci/vmtest/configs/DENYLIST-5.5.0

@@ -1,5 +0,0 @@
-# This complements ALLOWLIST-5.5.0 but excludes subtest that can't work on 5.5
-
-btf			# "size check test", "func (Non zero vlen)"
-tailcalls		# tailcall_bpf2bpf_1, tailcall_bpf2bpf_2, tailcall_bpf2bpf_3
-tc_bpf/tc_bpf_non_root

ci/vmtest/configs/run-vmtest.env

@@ -0,0 +1,37 @@
+#!/bin/bash
+
+# This file is sourced by libbpf/ci/run-vmtest Github Action scripts.
+
+# $SELFTESTS_BPF and $VMTEST_CONFIGS are set in the workflow, before
+# libbpf/ci/run-vmtest action is called
+# See .github/workflows/kernel-test.yml
+
+ALLOWLIST_FILES=(
+    "${SELFTESTS_BPF}/ALLOWLIST"
+    "${SELFTESTS_BPF}/ALLOWLIST.${ARCH}"
+    "${VMTEST_CONFIGS}/ALLOWLIST"
+    "${VMTEST_CONFIGS}/ALLOWLIST-${KERNEL}"
+    "${VMTEST_CONFIGS}/ALLOWLIST-${KERNEL}.${ARCH}"
+)
+
+DENYLIST_FILES=(
+    "${SELFTESTS_BPF}/DENYLIST"
+    "${SELFTESTS_BPF}/DENYLIST.${ARCH}"
+    "${VMTEST_CONFIGS}/DENYLIST"
+    "${VMTEST_CONFIGS}/DENYLIST-${KERNEL}"
+    "${VMTEST_CONFIGS}/DENYLIST-${KERNEL}.${ARCH}"
+)
+
+# Export pipe-separated strings, because bash doesn't support array export
+export SELFTESTS_BPF_ALLOWLIST_FILES=$(IFS="|"; echo "${ALLOWLIST_FILES[*]}")
+export SELFTESTS_BPF_DENYLIST_FILES=$(IFS="|"; echo "${DENYLIST_FILES[*]}")
+
+if [[ "${LLVM_VERSION}" -lt 18 ]]; then
+    echo "KERNEL_TEST=test_progs test_progs_no_alu32 test_maps test_verifier" >> $GITHUB_ENV
+else # all
+    echo "KERNEL_TEST=test_progs test_progs_cpuv4 test_progs_no_alu32 test_maps test_verifier" >> $GITHUB_ENV
+fi
+
+echo "cp -R ${SELFTESTS_BPF} ${GITHUB_WORKSPACE}/selftests"
+mkdir -p "${GITHUB_WORKSPACE}/selftests"
+cp -R "${SELFTESTS_BPF}" "${GITHUB_WORKSPACE}/selftests"