feat: Add conversion webhook config to dev CRD variant

[skhalash]

Description

Changes proposed in this pull request (what was done and why):

• Add a conversion webhook that convert between v1alpha1 and v1beta1 LogPipelines. The only difference in the schema: a mandatory application input in v1alpha1 vs an optional runtime input. This functionality is hidden behind the feature flag enable-v1beta1-log-pipelines
• Adjust the names of v1beta1 LogPipeline spec subtypes - add a LogPipeline prefix similar to MetricPipeline and TracePipeline
• Remove unneeded certmanager patches in kustomize: cainjection_in_*
• Refactor creating ValidatingWebhookConfiguration to make the linter happy

Changes refer to particular issues, PRs or documents:

• Introduce initial conversion webhook for beta version #1391

Traceability

• The PR is linked to a GitHub issue.
• The follow-up issues (if any) are linked in the Related Issues section.
• If the change is user-facing, the documentation has been adjusted.
• The feature is unit-tested.
• The feature is e2e-tested.

[kyma-bot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all