feat: Handle repository aliases

[Jumanjii]

This PR adds the ability to handle repository aliases.
ArgoCD helm repositories could be referenced by Application using @qonto, for example.

Until now, the upgrade manager would have skipped the application because it did not know how to handle the repository reference.

{"time":"2024-07-16T09:28:51.279338872Z","level":"INFO","msg":"Found 55 applications in xxx namespace"}
{"time":"2024-07-16T09:28:51.575640087Z","level":"ERROR","msg":"Could not load xxxx chart as software, error: could not determine RepoBackendType for url @qonto"}

With the modification introduced in this PR, it can now handle those "@qonto" references if they are defined in the configuration file.

(config file)

     repositories-aliases:
        "@my-alias": "https://prometheus-community.github.io/helm-charts"

(chart found using alias)

apiVersion: v2
appVersion: v2.3.3
description: A Helm chart for ArgoCD, a declarative, GitOps continuous delivery tool for Kubernetes.
name: TestApp5
version: 4.5.8
dependencies:
  - name: kube-prometheus-stack
    version: 60.0.0
    repository: '@my-alias'

(result)

time=2024-10-04T18:06:18.103+02:00 level=DEBUG msg="Populate dependency software for dep kube-prometheus-stack repo backend @my-alias"
time=2024-10-04T18:06:18.103+02:00 level=DEBUG msg="Repo URL @my-alias resolved to https://prometheus-community.github.io/helm-charts"
time=2024-10-04T18:06:18.103+02:00 level=DEBUG msg="Configuring HelmRepoBackend for kube-prometheus-stack"

[Jumanjii]

#sre

[alexandrediasldev]

LGTM 👍