Adding destroy flag to terraform plan in destroy.sh

[melihc1]

Link related issues:

• There aren't any issues related to this bug

Changes/added features:

• Destroy flag was added to terraform plan in destroy.sh

The following short checklist should be used to make sure your PR is of good quality, and can be merged easily:

• follows project conventions
• follows project principles
• ./run.sh works correctly for all new examples
• CI checks pass
• mergeable to main (no conflicts)
• resolved issues linked
• Milestone linked (if applicable)

Reviewers:
@ianmiell
@ttarczynski
@sanyer
@teszes
@choilmto
@rodrigorras

[melihc1]

/test