Bug 1777969: fix(knative-icons): show icons for event sources

[nemesis09]

This PR -

• fixes the issue in the jira issue https://jira.coreos.com/browse/ODC-2156
• makes icons for different event sources visible for the corresponding event source in topology
  Screen -
  

[christianvogt]

@nemesis09 please fix the linting errors

Tested PR and icons show up

[christianvogt]

/lgtm
/approve

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: christianvogt, nemesis09

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[nemesis09]

/cherrypick release-4.3

[openshift-cherrypick-robot]

@nemesis09: once the present PR merges, I will cherry-pick it on top of release-4.3 in a new PR and assign it to you.

In response to this:

/cherrypick release-4.3

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[openshift-cherrypick-robot]

@nemesis09: new pull request created: #3613

In response to this:

/cherrypick release-4.3

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[christianvogt]

/retitle Bug 1777969: fix(knative-icons): show icons for event sources

[openshift-ci-robot]

@nemesis09: All pull requests linked via external trackers have merged. Bugzilla bug 1777969 has been moved to the MODIFIED state.

In response to this:

Bug 1777969: fix(knative-icons): show icons for event sources

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