Add templates for bugs/enhancements/support

Signed-off-by: nyechiel <nyechiel@redhat.com>

.github/ISSUE_TEMPLATE/bug-report.md

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+---
+name: Bug Report
+about: Report a bug in Helm Charts
+labels: bug
+
+---
+
+<!-- Please use this template while reporting a bug and provide as much info as
+possible. Not doing so may result in your bug not being addressed in a timely
+manner. Thanks!
+
+If the matter is security related, please disclose it privately to the
+Submariner Owners: https://github.com/orgs/submariner-io/teams/submariner-core
+-->
+
+
+**What happened**:
+
+**What you expected to happen**:
+
+**How to reproduce it (as minimally and precisely as possible)**:
+
+**Anything else we need to know?**:
+
+**Environment**:
+- Submariner version (use `subctl version`):
+- Kubernetes version (use `kubectl version`):
+- Cloud provider or hardware configuration:
+- OS (e.g: `cat /etc/os-release`):
+- Kernel (e.g. `uname -a`):
+- Install tools:
+- Network plugin and version (if this is a network-related bug):
+- Others:

.github/ISSUE_TEMPLATE/enhancement.md

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+---
+name: Enhancement Request
+about: Suggest an enhancement to the Helm Charts project
+labels: enhancement
+
+---
+<!-- Please only use this template for submitting enhancement requests -->
+
+**What would you like to be added**:
+
+**Why is this needed**:

.github/ISSUE_TEMPLATE/support.md

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+---
+name: Support Request
+about: Support request or question relating to Helm Charts
+labels: support
+
+---
+
+<!--
+GitHub may not the right place for support requests.
+
+You can also post your question on the [Submariner
+Slack](https://kubernetes.slack.com/archives/C010RJV694M) or the Submariner
+[users](https://bit.ly/submariner-users) or
+[developers](https://bit.ly/submariner-dev) mailing lists.
+
+If the matter is security related, please disclose it privately to the
+Submariner Owners: https://github.com/orgs/submariner-io/teams/submariner-core
+-->