feat: add support for go-templates in argocd yaml files

[lstoeferle]

Changes

Hi everyone,
we recently discovered that Renovate silently skips Argo CD yaml-files, that are wrapped in go-templates like in the following example:

{{- if .Values.enabled }}
apiVersion: argoproj.io/v1alpha1
kind: Application
spec:
  source:
    chart: kube-state-metrics
    repoURL: https://prometheus-community.github.io/helm-charts
    targetRevision: 2.4.1
{{- end }}

Context

Closes #27762

Documentation (please check one with an [x])

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• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[renovate-release]

🎉 This PR is included in version 37.231.0 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)
• 37.231.0

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