Show dependency location count if `occurrenceCount` field is present

What does this MR do and why?

Related #467085 (closed)

Show dependency location count if occurrenceCount field is present, even it's it only 1 location, instead of the path.

We're doing this because (see related issue)

It's not possible to get both the project / location path and the counts in a performant manner, so we've decided to always show the counts even if there is only 1.

This follows Always show project count for group dependency ... (!156200 - merged) • Lorenz van Herwaarden • 17.2 which made a similar change for the project column.

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Before	After

How to set up and validate locally

1. Create a new group
2. Import https://gitlab.com/gitlab-examples/security/security-reports project in this new group
3. Import https://gitlab.com/lorenzvanherwaarden/security-reports-with-few-dependencies/ project in this new group (same as project above but with less dependencies)
4. Run a pipeline on both projects
5. Go to http://gdk.test:3000/groups/<your-group-name>/-/dependencies
6. Scroll through dependencies and check the Location column. It should contain rows with _2 locations and 1 location. For both, when you click a dropdown should appear with the list of the location(s) where these dependencies appear.

changed milestone to %17.2

added Category:Dependency Management devopsgovern frontend groupthreat insights maintenanceperformance sectionsec typemaintenance workflowin dev labels

assigned to @lorenzvanherwaarden

added pipelinetier-1 label

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added 131 commits

• fc160007...3a14b8c6 - 130 commits from branch master
• 549838f8 - Merge branch 'master' into 'dependency-list/prefer-location-count-to-path'

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Bundle size analysis [beta]

This compares changes in bundle size for entry points between the commits 15a00a1b and 3acc9482

✨ Special assets

Entrypoint / Name	Size before	Size after	Diff	Diff in percent
average	4.36 MB	4.36 MB	-	0.0 %
mainChunk	3.32 MB	3.32 MB	-	0.0 %

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Note: We do not have exact data for 15a00a1b. So we have used data from: ad5cf40c.
The target commit was too new, so we used the latest commit from master we have info on.
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This might mean that you have a few false positives in this report. If something unrelated to your code changes is reported, you can check this comparison in order to see if they caused this change.

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mentioned in epic &12371 (closed)

added 1 commit

• 4ce0f31b - Fix formatting with prettier

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removed workflowin dev label

added 1 commit

• 4c17c789 - Use shorter fallback for NaN

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changed the description

marked this merge request as ready

added 1 commit

• ffdeb14d - Fix description of test

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@dpisek could you do the initial review? It's similar to Always show project count for group dependency ... (!156200 - merged) • Lorenz van Herwaarden • 17.2.

We chose not to remove the location path display, because it's used on both the project and organization dependency list, where we do not have the occurrenceCount, see #467085 (comment 1947497281).

So the change is to always shows the location count and dropdown if there is an occurrenceCount.

requested review from @dpisek

mentioned in issue #467085 (closed)