chore: package charts not included as dependencies of 'hyperswitch-stack'

[Willem-Barkhuizen]

Summary

This commit adds a new task one can use to package the
'hyperswitch-istio' and 'hyperswitch-keymanager' charts in the event
that a change to one of them is required.

Testing

~/workplace/sft-multi-pay-hyperswitch-helm  ↱ fix_keymanager_helm_ext_pgsql_enabled ±  task package-incubator-chart CHART=keymanager
task: [package-incubator-chart] CHART="hyperswitch-keymanager" && STACK=charts/incubator/$CHART && version=$(grep '^version:' $STACK/Chart.yaml | awk '{print $2}') && helm package $STACK --dependency-update && helm repo index $STACK --url https://juspay.github.io/hyperswitch-helm/$STACK && mv $CHART-$version.tgz $STACK

Successfully packaged chart and saved it to: /Users/willem.barkhuizen/workplace/sft-multi-pay-hyperswitch-helm/hyperswitch-keymanager-0.1.0.tgz
~/workplace/sft-multi-pay-hyperswitch-helm  ↱ fix_keymanager_helm_ext_pgsql_enabled ±  git status
On branch fix_keymanager_helm_ext_pgsql_enabled
Your branch is ahead of 'upstream/main' by 1 commit.
  (use "git push" to publish your local commits)

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
	modified:   Taskfile.yaml
	modified:   charts/incubator/hyperswitch-keymanager/hyperswitch-keymanager-0.1.0.tgz
	modified:   charts/incubator/hyperswitch-keymanager/index.yaml

no changes added to commit (use "git add" and/or "git commit -a")

---

Signed-Off-By: Willem Barkhuizen ([email protected])