Create lightweight database dumps for testing purposes

[mayaCostantini]

Problem statement

As a developer of Thoth, I would like to test components using a local database instance without having to consume too many resources on my machine.
The current database backups generated in ocp4-stage/graph-backup/ are currently more than 11GiB, which represents a lot of memory resources to allocate and of overhead for loading tables and writing WALs.

Proposal description

Generate database backups for testing purposes with a limited number of entries in the tables containing the more entries, and where the risk of having missing entries would not disrupt too much the testing of components querying the database.

[mayaCostantini]

/priority important-soon
/sig devsecops

[mayaCostantini]

/good-first-issue

[sesheta]

@mayaCostantini:
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Please ensure the request meets the requirements listed here.

If this request no longer meets these requirements, the label can be removed
by commenting with the /remove-good-first-issue command.

In response to this:

/good-first-issue

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[sesheta]

Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.

If this issue is safe to close now please do so with /close.

/lifecycle stale