Use less report cache SQL when adding results (backport #1618)

[mergify]

This is an automatic backport of pull request #1618 done by Mergify.
Cherry-pick of 6d1797a has failed:

On branch mergify/bp/gvmd-21.04/pr-1618
Your branch is up to date with 'origin/gvmd-21.04'.

You are currently cherry-picking commit 6d1797a86.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   src/manage.c
	modified:   src/manage.h

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   src/manage_sql.c

To fix up this pull request, you can check it out locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

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