Extend custom linter configuration to cover BCP081 Resource type does not have types available

**Is your feature request related to a problem? Please describe.**
There are often cases where specific resource providers api versions can be used but aren't in the bicep intellisense/linter. Whilst the "best" case would be for 100% accuracy here, I think suppressing the warning through a custom bicepconfig.json is also viable.

**Describe the solution you'd like**
Simple solution;
A new rule to be useable in bicepconfig.json

"resource-types": {
"level": "Info"
}

Better solution
To be able to specifically add resource apis to ignore.

"resource-types": {
"level": "Off",
"ignoredRPs": [
"Microsoft.Authorization/roleAssignments@2021-04-01-preview"
]
}

Begin with the BCP081 linter rule and the bicepconfig.json settings shown in the issue. Review existing custom linter configuration behavior, then determine whether the completed change supports only a configurable severity or also ignored resource API entries, with tests covering the chosen configuration.

Written by the indexing model from the issue text.