[WIP] Adapt the CSI FvT e2e testsuite code to support new changes for both private network isolated testbeds and public network Nimbus testbeds.

[sipriyaa]

What this PR does / why we need it:
This PR introduces changes for the Nimbus testbed, allowing deployment on a private network/isolated network, or public network.

In a public network setup, the port numbers for vCenter (VC), Master, Worker VMs, and ESXi remain the same.

In a private network setup, the port numbers vary for each vSphere resource component.

Key changes in this PR include:

Resolving the vCenter address dynamically with its corresponding port number.

Mapping master IPs to their respective port numbers.

Removing hardcoded storage class names.

Reading port numbers and master IPs at runtime.

Dynamically determining the vCenter address (IP + PortNo) based on the specified network type (public or private).

removal of unnecessary duplicate code

Increase in the pvc creation timeout from 1 min to 5 mins

Testing done:
In progress

Special notes for your reviewer:
ps031044@P2XQC4DXP0 vsphere-csi-driver % golangci-lint run --enable=lll
ps031044@P2XQC4DXP0 vsphere-csi-driver % make golangci-lint
hack/check-golangci-lint.sh
golangci/golangci-lint info checking GitHub for tag 'v1.59.1'
golangci/golangci-lint info found version: 1.59.1 for v1.59.1/darwin/arm64
golangci/golangci-lint info installed /Users/ps031044/go/bin/golangci-lint
INFO golangci-lint has version 1.59.1 built with go1.22.3 from 1a55854a on 2024-06-09T18:08:33Z
INFO [config_reader] Config search paths: [./ /Users/ps031044/public-private-network/vsphere-csi-driver /Users/ps031044/public-private-network /Users/ps031044 /Users /]
INFO [config_reader] Used config file .golangci.yml
INFO [lintersdb] Active 8 linters: [errcheck gosimple govet ineffassign lll misspell staticcheck unused]

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: sipriyaa
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[k8s-ci-robot]

PR needs rebase.

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[kirankumarbasavaraju-broadcom]

1. List all the issues you have addressed here.
2. Take each issue in different PR and do not merge it in single PR (I see 10-12 issue addressed in this PR)
3. For now, discard this PR and raise a new PR only for private network test execution.
4. For private network, read ssh port number from ENV variable at the util and not in the test files or feature specific uitls.
5. Create a cache for the IP to port in the util and do the lazy reading whenever it is necessary during the execution