remove templates folders in favor of using templates repo

.gitlab/issue_templates/bug.md

-# Bug
-
-## Description
-
-Describe the problem, what were you doing when you noticed the bug?
-
-Provide any steps possible used to reproduce the error (ideally in an isolated fashion).
-
-## BigBang Version
-
-What version of BigBang were you running?
-
-This can be retrieved multiple ways:
-
-```bash
-# via helm
-helm ls -n bigbang
-
-# via the deployed umbrella git tag
-kubectl get gitrepository -n bigbang
-```
\ No newline at end of file

.gitlab/issue_templates/feature_request.md

-# Feature Request
-
-## Why
-
-What is the use case for the feature you are requesting? What are you trying to solve?
-
-The more detail here the better!
-
-## Proposed Solution
-
-If possible, provide details on the proposed solution.
-
-If your proposed solution _changes_ the existing behavior of a feature, please outline why your approach is recommended/better.

.gitlab/merge_request_templates/Default.md

-# General MR
-
-## Summary
-
-(Summarize the purpose of the MR)
-
-## Relevant logs/screenshots
-
-(Include any relevant logs/screenshots)
-
-<!--
-#### BB Processes
-
-Add labels for affected packages so that they are deployed in CI as well as a status label:
-
-/label ~packageX ~dependencyx ~status::doing
-
-Be sure to assign to yourself:
-
-/assign @yourself
-
-Once it is ready for review switch the status and assign reviewers:
-
-/label status::review
-
-/assign_reviewer @reviewer1 @reviewer2
--->

.gitlab/merge_request_templates/package_owner.md

-# Package Merge Request
-
-## Package Changes
-
-(Describe Package changes here)
-
-### Package MR
-
-(Link to Package MR here)
-
-### For Issue
-
-Closes (link to issue here)
-
-<!--
-#### BB Processes
-
-Add labels for affected packages so that they are deployed in CI as well as a status label:
-
-/label ~packageX ~dependencyx ~status::doing
-
-Be sure to assign to yourself:
-
-/assign @yourself
-
-Once it is ready for review switch the status and assign reviewers:
-
-/label status::review
-
-/reviewer @reviewer1 @reviewer2
--->