use non-root folder to create apply-license script

[osdemah]

Changes proposed in this PR:

• Use /tmp/scripts folder instead of the WORKDIR which is / to avoid getting permission denied errors when security context defaults to the non-root users

How I've tested this PR:

• I installed the helm chart with enterprise license on a k8s cluster that doesn't allow root user in security context by default and made sure the job runs Ok.

How I expect reviewers to test this PR:

• Inatall the helm chart in an openshift cluster with enterprise license and compare the pre-PR and post-PR behavior. The chart gets failed with permission denied error as openshift assigns a non-root user to the pods by default.

Checklist:

• Bats tests added
• CHANGELOG entry added (HashiCorp engineers only, community PRs should not add a changelog entry)

[hashicorp-cla]

All committers have signed the CLA.

[david-yu]

Hi @osdemah thank you for being a customer and we appreciate the PR. We might need to add some Bats tests to make sure that this is caught in our CI.

[lkysow]

Great work! Thanks for the PR.

I tested it out and the license applied as expected.