Fix custom node small icon load in library

[mmisol]

Purpose

Icons for packages custom nodes (dyf files) were not loaded in the
library. This was due to a bug that created a wrong url, which used a
default name, instead of the custom node id.

Fixes #10669

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated

Reviewers

@reddyashish @aparajit-pratap

FYIs

@DynamoDS/dynamo

[mmisol]

Before:

After:

[aparajit-pratap]

@mmisol looks good but I think there are few regressions, probably because you've added a new package and the tests counting the total number of packages need to be updated.

Question about whether:

1. icons can be added for zero touch nodes by following the steps in the wiki.
2. the wiki for adding icons to custom nodes is accurate.

[mmisol]

@aparajit-pratap Will check those tests.

For the example I'm showing here I followed those steps so I'd say it's accurate, only that the bug was preventing it from working.

I did not check ZT nodes because the reported issue was not related to them. I can also do that but should not be related to this PR. As you can see in the code this is a custom node specific error condition.