Add uprobe benchmark #628

Job	Run time
Build ebpf_exporter in Docker (aarch64, emulated, built-in libbpf)	9m 22s
Build libbpf in Docker (aarch64, emulated)	3m 15s
Build ebpf_exporter (x86_64, dynamically linked, built-in libbpf)	35s
Build ebpf_exporter in Docker (x86_64, built-in libbpf)	1m 10s
Build ebpf_exporter (x86_64, statically linked, built-in libbpf)	29s
Build libbpf in Docker (x86_64)	28s
Lint ebpf_exporter (x86_64, built-in libbpf)	20s
Test ebpf_exporter (x86_64, built-in libbpf)	50s
Build examples (x86_64, built-in libbpf)	23s
Run clang-format check	10s
Run jsonschema checks	9s
Publish Docker images (x86_64, aarch64)	10m 13s
Test ebpf_exporter (x86_64, system libbpf)	43s
Lint ebpf_exporter (x86_64, system libbpf)	19s
Build ebpf_exporter (x86_64, dynamically linked, system libbpf)	28s
Build ebpf_exporter (x86_64, statically linked, system libbpf)	30s
Build examples (x86_64, system libbpf)	21s
Check examples	6s
	29m 51s

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