Enable validate_import_decompressed_archive_size feature flag by default

What does this MR do?

This MR updates yml file to enable validate_import_decompressed_archive_size feature flag by default. It's been enabled on .com from May 27 and the primary purpose is to validate user uploaded project/group import archives.

Mentions #282245 (closed)

Screenshots (strongly suggested)

Does this MR meet the acceptance criteria?

Conformity

Availability and Testing

Security

Does this MR contain changes to processing or storing of credentials or tokens, authorization and authentication methods or other items described in the security review guidelines? If not, then delete this Security section.

  • Label as security and @ mention @gitlab-com/gl-security/appsec
  • The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
  • Security reports checked/validated by a reviewer from the AppSec team
Edited by George Koltsov