Ensure we don't allow invalid urls as source code links

[andrewballantyne]

Resolves: https://jira.coreos.com/browse/ODC-1930

Tests:

 PASS  packages/dev-console/src/components/import/__tests__/render-utils.spec.ts
  Ensure render utils works
    Ensure we do not get route decorator icons for invalid urls
      ✓ expect route decoration icon to give nothing for bad urls (2ms)
      ✓ expect no route when using inline javascript (1ms)
      ✓ expect no route when giving empty values
    Ensure we get expected icons with valid HTTPS links
      ✓ expect bitbucket icon
      ✓ expect github icon
      ✓ expect gitlab icon (1ms)
      ✓ expect git-alt icon when not a supported site
    Ensure we get expected icons with valid git SSH links
      ✓ expect bitbucket icon
      ✓ expect github icon (1ms)
      ✓ expect gitlab icon

[gijohn]

/retest
/lgtm

[rohitkrai03]

/test e2e-aws-console

[rohitkrai03]

/approve

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andrewballantyne, gijohn, rohitkrai03

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