UI: Align auth method config ttl value with system setting

[hellobontempo]

If a ttl has not been configured for a mount then the mount uses system defaults which is conveyed by a ttl: 0.

It's unclear what the actual default value is unless you run vault read sys/auth/token/tune.

⇒ vault read sys/auth/token/tune
Key                  Value
---                  -----
default_lease_ttl    768h
description          token based credentials
force_no_cache       false
max_lease_ttl        768h
token_type           default-service

The backend PR #23914 updates the sys/internal/ui/mounts endpoint to return the default TTL value if there is not a mount-specific TTL configured.

To leverage this update in the UI, we have to change the query for those records from sys/auth/:path to also use sys/internal/ui/mounts. By updating this request we can now see the system default TTL value:

[github-actions]

CI Results: failed ❌

[hellobontempo]

closing in favor of #26663