Update archive size validation feature flag

What does this MR do?

This MR updates feature flag validate_import_decompressed_archive_size to be disabled by default as there was a bug found #235949 (closed)

A fix to the bug is going to be introduced in the follow up MR

Screenshots

Does this MR meet the acceptance criteria?

Conformity

Availability and Testing

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

  • 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