fix(libsinsp/parsers): call immediately call on_erase_fd callback #2279

Job	Run time
build-test-e2e-amd64 😇 (bundled_deps)	15m 4s
build-test-e2e-arm64 😇 (bundled_deps)	10m 51s
test-e2e-amd64-kmod 😇 (bundled_deps)	9m 27s
test-e2e-amd64-bpf 😇 (bundled_deps)	14m 35s
test-e2e-amd64-modern-bpf 😇 (bundled_deps)	11m 16s
test-e2e-arm64-kmod 😇 (bundled_deps)	9m 41s
test-e2e-arm64-bpf 😇 (bundled_deps)	10m 44s
test-e2e-arm64-modern-bpf 😇 (bundled_deps)	11m 28s
	1h 33m 6s

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