Add support for multiple OIDC providers

### Current Behavior

[Alpine](https://github.com/stevespringett/Alpine) configuration supports only a single OIDC provider using `ALPINE_OIDC_*` variables.

### Proposed Behavior

For exemple, allowing login from both Gitlab and Github OIDC providers.

- Support multiple oidc providers in [Alpine](https://github.com/stevespringett/Alpine): stevespringett/Alpine#448
- Rename variables to `ALPINE_OIDC__*` like `APLINE_OIDC_GITLAB_ISSUER=https://gitlab.com`
- In OpenID Connect Groups => Teams mapping, add provider name
- (Provider: `gitlab` + Group: `inkscape`) gives access to Team `Inkscape dev`

### Checklist

- [X] I have read and understand the [contributing guidelines](https://github.com/DependencyTrack/dependency-track/blob/master/CONTRIBUTING.md#filing-issues)
- [X] I have checked the [existing issues](https://github.com/DependencyTrack/dependency-track/issues) for whether this enhancement was already requested