Show errors if any when updating managed setting in saved object

[mrodm]

Follows #3007

This PR helps to debug errors when editing dashboards if there is any error importing those saved objects.
In case there are errors, those are shown as part of the error message shown in elastic-package.

Before:

$ elastic-package edit dashboards
Make Kibana dashboards editable
? Which package would you like to export dashboards from?: profilingmetrics_otel-0.0.1
? Which dashboards would you like to export?: Profilingmetrics (ID: profilingmetrics_otel-cf4d74ec-b406-4314-9519-2569d24002fe, Type: dashboard)

Error: failed to make one or more dashboards editable: importing dashboard profilingmetrics_otel-cf4d74ec-b406-4314-9519-2569d24002fe was not successful

After:

$ elastic-package edit dashboards
Make Kibana dashboards editable
? Which package would you like to export dashboards from?: profilingmetrics_otel-0.0.1
? Which dashboards would you like to export?: Profilingmetrics (ID: profilingmetrics_otel-cf4d74ec-b406-4314-9519-2569d24002fe, Type: dashboard)

Error: failed to make one or more dashboards editable: importing dashboard profilingmetrics_otel-cf4d74ec-b406-4314-9519-2569d24002fe was not successful: ID: profilingmetrics_otel-cf4d74ec-b406-4314-9519-2569d24002fe, Type: dashboard, Error: map[references:[map[id:72c09aba-3449-477f-aebf-0694d94fed70 type:index-pattern]] type:missing_references]

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: a5193d5

cc @mrodm

[jsoriano]

Error: failed to make one or more dashboards editable: importing dashboard profilingmetrics_otel-cf4d74ec-b406-4314-9519-2569d24002fe was not successful: ID: profilingmetrics_otel-cf4d74ec-b406-4314-9519-2569d24002fe, Type: dashboard

The saved object type and id appear twice now, we could only include the errors.

Error: map[references:[map[id:72c09aba-3449-477f-aebf-0694d94fed70 type:index-pattern]] type:missing_references]

The error is still a bit cryptic, but more significant than before.

[mrodm]

Error: failed to make one or more dashboards editable: importing dashboard profilingmetrics_otel-cf4d74ec-b406-4314-9519-2569d24002fe was not successful: ID: profilingmetrics_otel-cf4d74ec-b406-4314-9519-2569d24002fe, Type: dashboard

The saved object type and id appear twice now, we could only include the errors.

I re-phrased these errors to be like:

Error: failed to make one or more dashboards editable: failed to import one or more saved objects: ID: profilingmetrics_otel-cf4d74ec-b406-4314-9519-2569d24002fe, Type: dashboard, Error: map[references:[map[id:72c09aba-3449-477f-aebf-0694d94fed70 type:index-pattern]] type:missing_references]

WDYT @jsoriano ?

Error: map[references:[map[id:72c09aba-3449-477f-aebf-0694d94fed70 type:index-pattern]] type:missing_references]

The error is still a bit cryptic, but more significant than before.

I couldn't find the specification of these errors (API docs link), it looks like there could be any field there. That's why I just set %v to show the errors variable.