Remove OAM support

[Aisuko]

Description

According to https://github.com/meshery/meshery/issues/7434, we should remove all the code related to OAM. Meshery server and some of adapters like meshery-linkered see https://github.com/meshery/meshery-linkerd/pull/519

But here we can see OAM still in current repo. We need to remove these no useful code too. Because:

• No features are dependent on these code
• These code does not under maintain
• Some of out of date dependencies of these code are caused security issues to every adapter.

Expected Behavior

Screenshots

Environment:

• OS: [e.g. Ubuntu]
• Browser: [e.g. Chrome, Safari]
• Version: [e.g. 22]
• Device: [e.g. laptop, iPhone 8]

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[Optional] To Reproduce Steps to reproduce the behavior:

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3. Scroll down to '....'
4. See error

[Optional] Additional Context

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