500 when loading Observability Infrastructure Inventory view after upgrading to 8.10.0 or higher

[jguay]

Kibana version:
8.10.0 or higher (reported after upgrading to 8.13.4)
Describe the bug:
In #160852 we enforce strict checks on inventory view... However during kibana upgrade, the inventory view do not seem to be corrected, so this potentially breaks Inventory view :

• If the default view is affected, navigating to Observability / Infrastructure / Inventory causes a 500 error when javascript requests GET kbn:/api/infra/inventory_views/<inventory_ID>
• If the default inventory view is not affected, after navigating, trying to change view with drop down Managed views brings back empty list and 500 popup Failed to fetch inventory views: Error: Internal Server Error when javascript request GET kbn:/api/infra/inventory_views

Steps to reproduce:

1. In 8.9.2, run this (20 steps for colors is higher than the UI max of 18 but it is allowed):

POST kbn:/api/saved_objects/inventory-view
{"attributes":{"metric":{"type":"cpu"},"sort":{"by":"name","direction":"desc"},"groupBy":[],"nodeType":"host","view":"map","customOptions":[],"customMetrics":[],"boundsOverride":{"min":0,"max":1},"autoBounds":true,"accountId":"","region":"","autoReload":false,"filterQuery":{"expression":"","kind":"kuery"},"legend":{"palette":"cool","reverseColors":false,"steps":20},"timelineOpen":false,"name":"test"}}

2. Upgrade to 8.14.1
3. Go to network tab of Browser developer tools
4. Reproduce the 500 internal error going to try to load the inventory view

{
    "statusCode": 500,
    "error": "Internal Server Error",
    "message": "Failed to validate: \n  in 1/legend/steps: 20 does not match expected type InRange"
}

• Another example in this case field inventory-view.boundsOverride.max is higher than maximum allowed 1

{
    "statusCode": 500,
    "error": "Internal Server Error",
    "message": "Failed to validate: \n  in 0/boundsOverride/max: 1.0090000000000001 does not match expected type InRange"
}

Errors in browser console (if relevant):

core.entry.js:1 
       GET https://localhost:5601/api/infra/inventory_views 500 (Internal Server Error)

[elasticmachine]

Pinging @elastic/obs-ux-infra_services-team (Team:obs-ux-infra_services)

[lucabelluccini]

Hello @smith, we've created this public issue but we have 3/4 occurrences already.

[bryce-b]

It appears the inventory_view saved_object definition didn't get a model version change per https://docs.elastic.dev/kibana-dev-docs/tutorials/saved-objects#defining-model-versions adding this and back-porting it to 8.10.0 ought to fix this issue.

AC: When upgrading kibana from 8.9.2 (or any version below 8.10.0) to 8.10.0 the inventory_view saved_object should cap the value of the legend.steps attribute to a maximum of 18. This should resolve the 500 error described above.