fix: handle missing MC resource group on abe2e clusters

[cameronmeissner]

What type of PR is this?

What this PR does / why we need it:

tested locally and seems to work great

=== NAME  Test_ubuntu2204privatekubepkg
    cluster.go:177: node resource group of cluster abe2e-kubenet-331fc does not exist, will attempt to recreate
    cluster.go:220: Attempt 1: creating or updating cluster abe2e-kubenet-331fc in region westus3 and rg abe2e-westus3
    cluster.go:190: creating or updating cluster abe2e-kubenet-331fc in rg westus3
=== NAME  Test_azurelinuxv2gpu_azurecni
    cluster.go:177: node resource group of cluster abe2e-azure-network-1bef8 does not exist, will attempt to recreate
    cluster.go:220: Attempt 1: creating or updating cluster abe2e-azure-network-1bef8 in region westus3 and rg abe2e-westus3
    cluster.go:190: creating or updating cluster abe2e-azure-network-1bef8 in rg westus3
    cluster.go:121: node resource group: MC_abe2e-westus3_abe2e-azure-network-1bef8_westus3

Which issue(s) this PR fixes:

Fixes #

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Special notes for your reviewer:

Release note:

none