[CE-187] Migrate to new forge/kvs storage package and upgrade all dependencies

[clouless]

Task

Due to CHANGE-2924 we need to migrate to the permissions storage of the app to the new forge KVS API.

Acceptance criteria

• ✅ use of forge/kvs package instead of deprecated forge/api package
• ✅ all other dependencies are up to date
• ✅ The legacy storage module of @forge/api returned an UNDEFINED error to any request that specified a key that doesn’t exist. The @forge/kvs will now return a KEY_NOT_FOUND error instead.
• ✅ Replace startsWith filter with beginsWith
• ✅ dev dependencies are filtered out in backend package.json before deoloy (false positive ecosystem scanner for e.g. jest test dependencies)

Migration notes KVS

https://developer.atlassian.com/platform/forge/storage-reference/kvs-migration-from-legacy/#migrating-to--forge-kvs-from-legacy-storage-module