Helm: Allow annotations on the configmap.

[BenCoughlan15]

This pull request introduces enhancements to the Helm chart for Nessie by adding support for custom annotations in the ConfigMap. The changes ensure that users can define additional annotations through the values.yaml file, which will be applied to the ConfigMap.

This would allow us to set the argocd sync-wave, which ensures the CM syncs first, leading to a more stable Nessie deployment.
i.e.

  annotations:
    argocd.argoproj.io/sync-wave: "-1"

There may of course, be other use cases.

Key changes include:

• helm/nessie/templates/configmap.yaml: Added support for custom annotations by including a conditional block to insert annotations if they are defined in the values.yaml file.
• helm/nessie/values.yaml: Introduced a new field configMapAnnotations to allow users to specify additional annotations for the ConfigMap.

[CLAassistant]

All committers have signed the CLA.

[dimas-b]

Thanks for your contribution, @BenCoughlan15 !

[adutra]

LGTM with some minor remarks.

Also could you please create a new test file configmap_test.yaml and add tests like the ones below:

release:
  name: nessie
  namespace: nessie-ns

templates:
  - configmap.yaml

tests:
  - it: should not create annotations by default
    asserts:
      - notExists:
          path: metadata.annotations
  - it: should create annotations if defined
    set:
      configMapAnnotations:
        foo: bar
    asserts:
    - equal:
        path: metadata.annotations
        value:
          foo: bar
  - it: should create annotations with templates
    set:
      configMapAnnotations:
        foo: configmap-{{ .Release.Name }}-{{ .Release.Namespace }}
    asserts:
      - equal:
          path: metadata.annotations
          value:
            foo: configmap-nessie-nessie-ns

[adutra]

Two minor suggestions:

1. Put the if block start before annotations:
2. Use tpl to templetize the input (I know we don't do this for configMapLabels line 27 – but maybe we should, in fact)

Suggested change

	annotations:
	{{- if .Values.configMapAnnotations }}
	{{- toYaml .Values.configMapAnnotations | nindent 4 }}
	{{- end }}
	{{- if .Values.configMapAnnotations }}
	annotations:
	{{- tpl (toYaml .Values.configMapAnnotations) . | nindent 4 }}
	{{- end }}