Add Kubernetes option in ISSUE_TEMPLATE.md
Add Kubernetes option in ISSUE_TEMPLATE.md

Since deploying to Kubernetes is now in 'master', and setup.bash has
been renamed legacy-setup.bash, add an option to declare issues
related to Kubernetes deployments.
Keeping the setup.bash option at the moment, for transition from legacy.

Signed-off-by: Piotr PAWLICKI <2287aedfa4ad488cf7e5bd70affb89bc390b7ad2@seovya.net>

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