[Bug]: Add ARM linting rule to flag @get operation override on ArmResourceActionAsync and ArmProviderActionAsync

[allenjzhang]

Describe the bug

Default Action verb is @post, but we do allow verb override to such as @get. Should have linting rule to flag error on anything other than @post.

Reproduction

Playground

Checklist

• Follow our Code of Conduct
• Check that this issue is about the Azure libraries for typespec. For bug in the typespec language or core libraries file it in the TypeSpec repo
• Check that there isn't already an issue that request the same bug to avoid creating a duplicate.
• The provided reproduction is a minimal reproducible example of the bug.

[AlitzelMendez]

talked with Allen offline and the purpose of this issue: a new rule to flag anything other than get and post as error.