[Feature flag] Default enable feature flag catfile_cache_nonrepeating

What

Default enable the :catfile_cache_nonrepeating feature flag.

Owners

• Team: Gitaly
• Most appropriate slack channel to reach out to: #g_gitaly
• Best individual to reach out to: NAME

Steps

• Change the feature flag to default-enabled (howto)

Please refer to the documentation of feature flags for further information.