[DocDB] Show user friendly Remaining ht_lease for RF1 tables

[hari90]

Jira Link: DB-11956

Description

For RF-1, the lease is always the max value.
Change it to N/A or N/A:RF1 to avoid confusion

Issue Type

kind/improve-ux

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[hari90]

https://yugabyte.slack.com/archives/C4K1838GL/p1719349162115759