fix(helm): Do not strip whitespace in target definitions for querier and read deployments

[jkroepke]

What this PR does / why we need it:

Follow-up of #19461 (Helm CI was red, was not good to merged)

Which issue(s) this PR fixes:

Special notes for your reviewer:

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Tests updated
• Title matches the required conventional commits format, see here
  • Note that Promtail is considered to be feature complete, and future development for logs collection will be in Grafana Alloy. As such, feat PRs are unlikely to be accepted unless a case can be made for the feature actually being a bug fix to existing behavior.
• Changes that require user attention or interaction to upgrade are documented in docs/sources/setup/upgrade/_index.md
• 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

[jkroepke]

We should not strip whitespaces on the list of args, otherwise they will be in one line and the arg parser of loki gets wrong arguments,

level=error ts=2025-10-09T18:00:10.335274496Z caller=log.go:223 msg="error running loki" err="unrecognised module name: read- -legacy-read-mode=false"

https://github.com/grafana/loki/actions/runs/18384060163/job/52379407344#step:10:2271

[trevorwhitney]

thank you for following up with the CI fix, looks like the last one got merged inadvertently.

[jkroepke]

It seems like the Helm CI is not part of the required Checks, maybe this is confusing.

[trevorwhitney]

@jkroepke I don't know how to make a conditional check required, so no, the helm checks aren't required

[jkroepke]

gateway was broken as well:

        location ^~ /ui {
          proxy_set_header X-Scope-OrgID $remote_user;
          proxy_pass       http://http.release-name-loki-querier.svc.default:3100%!(EXTRA string=cluster.local, string=3100)$request_uri;
        }