Enrich GCP asset types with multiple values

[orouz]

Summary of your changes

1. modifies ECS types that accept a keyword from string to []string
2. adds cloud run enricher
3. adds utility function to traverse maps/arrays and collect leaf string values
4. improves testing to account for all enrichers

with this PR, all asset types required for GA are fetched and enriched plus additional enrichments we may want to include next would be easy to collect.

Screenshot/Data

Related Issues

• closes Enrich asset types with multiple values #3018

[mergify]

This pull request does not have a backport label. Could you fix it @orouz? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-v./d./d./d is the label to automatically backport to the 8./d branch. /d is the digit
• backport-active-all is the label that automatically backports to all active branches.
• backport-active-8 is the label that automatically backports to all active minor branches for the 8 major.
• backport-active-9 is the label that automatically backports to all active minor branches for the 9 major.
  NOTE: backport-v8.x has been added to help with the transition to the new branch 8.x.

[orouz]

in order to test WithRelatedAssetIds i needed an exported field, so i replaced Entity.relatedEntityId with Related.Entity

[orouz]

changes in this function aren't required for this PR, but since i introduced values function to extract values from a protobuf map, using it here simplifies the code and makes it more readable and consistent with the rest of the file.

[orouz]

i'm not sure why we're adding binding.Role and binding.Members just for projects and buckets asset types.

unrelated to this PR tho

[orouz]

extracting values from a protobuf is kind of a pain. (GetStructValue().GetFields(), GetListValue().GetValues())

this function simplifies extraction by enabling map/array traversal with provided keys and defaults to returning an empty slice.

for example, this is how we collect values for a container name:

containerNames: = values([]string{"spec", "template", "spec", "containers", "name"}, pb)

instead of:

var containerNames []string

specField, ok := s.Fields["spec"]
if !ok {
  return nil
}

templateField, ok := specField.GetStructValue().Fields["template"]
if !ok {
  return nil
}

specTemplateField, ok := templateField.GetStructValue().Fields["spec"]
if !ok {
  return nil
}

containersField, ok := specTemplateField.GetStructValue().Fields["containers"]
if !ok {
  return nil
}

containersList, ok := containersField.GetListValue().GetValues()
if !ok {
  return nil
}

for _, container := range containersList {
  if nameField, ok := container.GetStructValue().Fields["name"]; ok {
    containerNames = append(containerNames, nameField.GetStringValue())
  }
}

return containerNames