Allow custom downstream k8s version for workflows

[valaparthvi]

What does this PR do?

This PR adds an input to pass custom downstream k8s version.

Which issue(s) this PR fixes (optional, in fixes #(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):

Fixes #27

Checklist:

• Squashed commits into logical changes
• Documentation
• GitHub Actions (if applicable)
  1. AKS-E2E
  2. EKS-E2E
  3. GKE-E2E
     After Fix bugs introduced in geolocalization PR and add labels #39 was merged and the branch was rebased
  4. AKS-E2E
  5. EKS-E2E
  6. GKE-E2E
     After e2d9bfa
  7. AKS-E2E
  8. EKS-E2E
  9. GKE-E2E
     post-rebase
  10. GKE-E2E,
  11. EKS-E2E
  12. AKS-E2E
      post cd73dbe
  13. GKE-E2E-import

Special notes for your reviewer:

GKE:

  Running command: gcloud [container clusters create auto-gkehostcluster-fysfb --project *** --zone asia-south2-c --cluster-version 1.28.5-gke.1217000 --labels owner=hosted-providers-qa-ci-gh-runner,testfilenumber=line48_gke-p0-p0_importing_test --network default --release-channel None --machine-type n2-standard-2 --disk-size 100 --num-nodes 1 --no-enable-cloud-logging --no-enable-cloud-monitoring --no-enable-master-authorized-networks]
  Created GKE cluster:  auto-gkehostcluster-fysfb

EKS:

 Captured StdOut/StdErr Output >>
  Creating EKS cluster ...
  Running command: eksctl [create cluster --region=*** --name=auto-ekshostcluster-ovduu --version=1.28 --nodegroup-name ranchernodes --nodes 1 --managed --tags owner=hosted-providers-qa-ci-gh-runner,testfilenumber=line50_eks-p0-p0_importing_test]
  Created EKS cluster:  auto-ekshostcluster-ovduu

AKS:

  Creating AKS resource group ...
  Running command: az [group create --location centralindia --resource-group auto-akshostcluster-zfriy]
  Creating AKS cluster ...
  Running command: az [aks create --resource-group auto-akshostcluster-zfriy --generate-ssh-keys --kubernetes-version 1.28.0 --enable-managed-identity --name auto-akshostcluster-zfriy --node-count 1 --tags "owner=hosted-providers-qa-ci-gh-runner" "testfilenumber=line123_aks-p0-p0_importing_test" ]
  Created AKS cluster:  auto-akshostcluster-zfriy

Blocked until #39 is merged.