netfilter: allow exp not to be removed in nf_ct_find_expectation

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "include/net/netfilter/nf_conntrack_expect.h",
                        "net/netfilter/nf_conntrack_core.c",
                        "net/netfilter/nf_conntrack_expect.c",
                        "net/netfilter/nft_ct.c"
                    ],
                    "versions": [
                        {
                            "version": "1bc91a5ddf3eaea0e0ea957cccf3abdcfcace00e",
                            "lessThan": "3fa58a6fbd1e9e5682d09cdafb08fba004cb12ec",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1bc91a5ddf3eaea0e0ea957cccf3abdcfcace00e",
                            "lessThan": "4914109a8e1e494c6aa9852f9e84ec77a5fc643f",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "include/net/netfilter/nf_conntrack_expect.h",
                        "net/netfilter/nf_conntrack_core.c",
                        "net/netfilter/nf_conntrack_expect.c",
                        "net/netfilter/nft_ct.c"
                    ],
                    "versions": [
                        {
                            "version": "5.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.18",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.130",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }