Feat: Add Autodiscovery for Maven dependencies

[olblak]

Fix #XXX

• Credentials handling

Test

To test this pull request, you can run the following commands:

Scenario 1

go build -o bin/updatecli && ./bin/updatecli diff --config e2e/updatecli.d/warning.d/autodiscovery/maven/git.yaml --experimental 
cd pkg/plugins/autodiscovery/maven/
go test

Scenario 2

go build -o bin/updatecli 
cd <to a Maven project>
updatecli diff --experimental --local-autodiscovery

Additional Information

This crawler can be used such as

autodiscovery:
  # scmid is applied to all crawlers
  scmid: default
  crawlers:
    maven:
      # By default enabled
      enable: true
      # To ignore specific path
      #ignore:
      #  - path: <filepath relative to scm repository>
      #only:
      #  - path: <filepath relative to scm repository>

Tradeoff

After additional thoughts on how to handle credentials, I came to the conclusion that it would be easier to expose some parameter to provide credentials mapping repositories then trying to fetch those credentials from settings.xml

autodiscovery:
  # scmid is applied to all crawlers
  scmid: default
  crawlers:
    maven:
      # By default enabled
      enable: true
      # To ignore specific path
      #ignore:
      #  - path: <filepath relative to scm repository>
      #only:
      #  - path: <filepath relative to scm repository>
      auths:
          repo.jenkins-ci.org:
              username: xxx
              password: yyy

Potential improvement

[olblak]

I'll look to the credentials in a different PR. I am gonna merge the PR so I can already start testing it widely