Revert "fix(helm): truncate the helm.sh/chart label to 63 bytes"

This reverts commit 4f7f706a63.

Version hygiene belongs to the pipeline that mints chart versions, not to the
chart. The build workflow now caps the version slug so litellm-<version> fits
the 63 byte label budget, which removes the overflow at the source rather than
silently truncating a value operators use to identify the build.

Drops the litellm.chart helper, restores the direct helm.sh/chart printf, and
removes tests/chart_label_tests.yaml. Both chart suites stay green:

  helm unittest -f 'tests/*.yaml' helm/litellm      # 20 passed
  helm unittest -f 'tests/*.yaml' helm/litellm-helm # 69 passed

helm/litellm/templates/_helpers.tpl

@@ -27,20 +27,11 @@ Common naming + label helpers shared by gateway, backend, and ui templates.
 {{- printf "%s-ui" (include "litellm.fullname" .) | trunc 63 | trimSuffix "-" -}}
 {{- end -}}
 
-{{/*
-Chart label. Kubernetes caps a label value at 63 bytes, and .Chart.Version is
-unbounded: CI branch builds version charts as 0.0.0-branch-<branch>-<sha>, which
-overflows and makes the API server reject every labeled resource.
-*/}}
-{{- define "litellm.chart" -}}
-{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
-{{- end -}}
-
 {{- define "litellm.commonLabels" -}}
 app.kubernetes.io/name: {{ include "litellm.name" . }}
 app.kubernetes.io/instance: {{ .Release.Name }}
 app.kubernetes.io/managed-by: {{ .Release.Service }}
-helm.sh/chart: {{ include "litellm.chart" . }}
+helm.sh/chart: {{ printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" }}
 {{- end -}}
 
 {{/*

helm/litellm/tests/chart_label_tests.yaml

@@ -1,60 +0,0 @@
-suite: test helm.sh/chart label stays within the 63 byte kubernetes limit
-templates:
-  - gateway/deployment.yaml
-  - gateway/configmap.yaml
-  - backend/deployment.yaml
-  - ui/deployment.yaml
-  - migrations-job.yaml
-values:
-  - ./values/required.yaml
-tests:
-  - it: renders the plain chart label for a normal semver version
-    template: gateway/deployment.yaml
-    chart:
-      version: 0.1.0
-    asserts:
-      - equal:
-          path: metadata.labels["helm.sh/chart"]
-          value: litellm-0.1.0
-
-  # CI publishes branch builds as 0.0.0-branch-<branch>-<sha>. Untruncated, the
-  # label is 64 bytes and the API server rejects every labeled resource with
-  # "must be no more than 63 bytes", which wedges the whole release.
-  - it: truncates a long branch-build version to 63 bytes on the gateway
-    template: gateway/deployment.yaml
-    chart:
-      version: 0.0.0-branch-litellm-enterprise-request-metering-f0b217f
-    asserts:
-      - equal:
-          path: metadata.labels["helm.sh/chart"]
-          value: litellm-0.0.0-branch-litellm-enterprise-request-metering-f0b217
-
-  - it: truncates the long version on the migrations job that blocked the sync
-    template: migrations-job.yaml
-    chart:
-      version: 0.0.0-branch-litellm-enterprise-request-metering-f0b217f
-    asserts:
-      - equal:
-          path: metadata.labels["helm.sh/chart"]
-          value: litellm-0.0.0-branch-litellm-enterprise-request-metering-f0b217
-
-  - it: truncates the long version on backend and ui
-    templates:
-      - backend/deployment.yaml
-      - ui/deployment.yaml
-    chart:
-      version: 0.0.0-branch-litellm-enterprise-request-metering-f0b217f
-    asserts:
-      - equal:
-          path: metadata.labels["helm.sh/chart"]
-          value: litellm-0.0.0-branch-litellm-enterprise-request-metering-f0b217
-
-  # trunc can land on the separator; a label value may not end in a dash.
-  - it: never leaves a trailing dash after truncation
-    template: gateway/deployment.yaml
-    chart:
-      version: 0.0.0-branch-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-bbb
-    asserts:
-      - matchRegex:
-          path: metadata.labels["helm.sh/chart"]
-          pattern: "[^-]$"