mgmt, network, bug fix on bastion resource in subnet ipconf

[weidongxu-microsoft]

fix #43070

Filter out resource that is not Microsoft.Network/networkInterfaces.

Description

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[azure-sdk]

API change check

API changes are not detected in this pull request.

[XiaofeiCao]

test?

[weidongxu-microsoft]

test?

I've added a test case for bastion https://github.com/Azure/azure-sdk-for-java/pull/43082/files#diff-323edf5682fe51f9f310ee479a68db1a799a2c43fee5777600edfc9f99b35774