Always return the upstream aliases when no alias groups are generated #2374
Description
Describe the bug
Some vulnerabilities in OSV do not mention alias whereas the source link has alias data.
To Reproduce
https://vuln.go.dev/ID/GO-2024-2947.json mentions two aliases whereas https://api.osv.dev/v1/vulns/GO-2024-2947 does not.
Similar behaviour observed in case of GO-2024-2918, GHSA-v6v8-xj6m-xwqh, GO-2024-2963
Expected behaviour
If alias is available in source data, same should be provided by OSV.
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Additional context
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