Fixup make generate-conversion

[vishesh92]

Issue #, if available:

Description of changes:
While running make generate-conversion, it returns a warning

E0530 15:46:54.126216  477229 conversion.go:756] Warning: could not find nor generate a final Conversion function for sigs.k8s.io/cluster-api-provider-cloudstack/api/v1beta3.CloudStackFailureDomainSpec -> ./api/v1beta2.CloudStackFailureDomainSpec
E0530 15:46:54.126252  477229 conversion.go:757]   the following fields need manual conversion:
E0530 15:46:54.126256  477229 conversion.go:759]       - Project

And the build fails with the below error:

api/v1beta2/zz_generated.conversion.go:147:10: undefined: Convert_v1beta3_CloudStackFailureDomainSpec_To_v1beta2_CloudStackFailureDomainSpec
api/v1beta2/zz_generated.conversion.go:574:14: undefined: Convert_v1beta3_CloudStackFailureDomainSpec_To_v1beta2_CloudStackFailureDomainSpec
api/v1beta2/zz_generated.conversion.go:630:12: undefined: Convert_v1beta3_CloudStackFailureDomainSpec_To_v1beta2_CloudStackFailureDomainSpec

Testing performed:

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[blueorangutan]

Test Results : (tid-455)
Environment: kvm Rocky8(x3), Advanced Networking with Management Server Rocky8
Kubernetes Version: v1.27.2
Kubernetes Version upgrade from: v1.26.5
Kubernetes Version upgrade to: v1.27.2
CloudStack Version: 4.19
Template: ubuntu-2004-kube
E2E Test Run Logs: https://github.com/blueorangutan/capc-prs/releases/download/capc-pr-ci-cd/capc-e2e-artifacts-pr360-sl-455.zip

Summarizing 4 Failures:
 [FAIL] When testing Kubernetes version upgrades [It] Should successfully upgrade kubernetes versions when there is a change in relevant fields
 /root/go/pkg/mod/sigs.k8s.io/cluster-api/[email protected]/framework/cluster_helpers.go:144
 [FAIL] When testing app deployment to the workload cluster [TC1][PR-Blocking] [It] Should be able to download an HTML from the app deployed to the workload cluster
 /jenkins/workspace/capc-e2e-new/test/e2e/deploy_app.go:111
 [FAIL] When testing app deployment to the workload cluster with slow network [ToxiProxy] [It] Should be able to download an HTML from the app deployed to the workload cluster
 /jenkins/workspace/capc-e2e-new/test/e2e/deploy_app_toxi.go:135
 [FAIL] When testing project [AfterEach] Should create a cluster in a project
 /jenkins/workspace/capc-e2e-new/test/e2e/project.go:103

Ran 29 of 30 Specs in 9796.191 seconds
FAIL! -- 25 Passed | 4 Failed | 0 Pending | 1 Skipped
--- FAIL: TestE2E (9796.19s)
FAIL

[rohityadavcloud]

/approve
/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: rohityadavcloud, vishesh92

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