fix(operator): Configure Loki to use virtual-host-style URLs for S3 AWS endpoints

[btaani]

What this PR does / why we need it:
Change Loki's configuration to use virtual-host-style instead of path-style URLs when the object storage endpoint is AWS S3.

Which issue(s) this PR fixes:
Fixes LOG-5051

Special notes for your reviewer:

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Tests updated
• CHANGELOG.md updated
  • If the change is worth mentioning in the release notes, add add-to-release-notes label
• Changes that require user attention or interaction to upgrade are documented in docs/sources/setup/upgrade/_index.md
• For Helm chart changes bump the Helm chart version in production/helm/loki/Chart.yaml and update production/helm/loki/CHANGELOG.md and production/helm/loki/README.md. Example PR
• If the change is deprecating or removing a configuration option, update the deprecated-config.yaml and deleted-config.yaml files respectively in the tools/deprecated-config-checker directory. Example PR

[xperimental]

Did not test it yet with any cluster, but setting the s3forcepathstyle attribute based on whether we're actually using AWS is a nice workaround for not being able to break compatibility with other providers.

One general remark would be to put less of the logic into the go-template: instead of having a function and a conditional running in the template, move the force path style into an attribute of the context provided to the template and set the value from outside the template.