chore(deps): replace mitchellh/mapstructure with go-viper/mapstructure/v2

[Abhishek9639]

Description

Swap out the archived mitchellh/mapstructure for the maintained go-viper/mapstructure/v2 fork. score-go is already at v1.13.0 which includes the same migration.

Changes:

• Updated the import in internal/provisioners/provisioning.go.
• Replaced mitchellh/mapstructure with go-viper/mapstructure/v2 in go.mod.
• Ran go mod tidy.

What does this PR do?

mitchellh/mapstructure is archived and no longer maintained. This replaces it with the actively maintained fork, as discussed in score-spec/score-compose#443. The same migration was already done in score-go (score-spec/score-go#176), score-compose (score-spec/score-compose#450), and score-k8s (score-spec/score-k8s#280).

Types of changes

• New chore (expected functionality to be implemented)

Checklist:

• I've signed off with an email address that matches the commit author.

[Abhishek9639]

Hi @mathieu-benoit,

Opened the PR for the score-radius repo as well same mapstructure migration pattern. score-go was already at v1.13.0 here so only the direct dependency swap was needed.

Both score-k8s (#280) and score-radius (#59) are now ready for your review.
Let me know if anything needs to be changed.

Thanks!