[roll] Roll fuchsia [ffx] Lazy initialization and refactor of fhoEnvironment

This refactors FhoEnvironment to position it for
refactoring the daemon dependencies out of the fho crate to
improve build times for tools that do no use overnet.

There are several small changes of note:

 * Making the members of FhoEnvironment private and adding
   getters and setters as needed.

 * Adding `new_for_test` method to allow initialization of all
   members.

 * Moving FhoEnvironment and referenced traits to fho_env.rs.

 * Moving TryFromEnv trait and std implementations to try_from_env.rs.

 * Changing lazily initialized members to be reference only
   locally defined traits, and wrapping in Arc<RwLock<> for
   internal mutability.

 * Wrapping lazily initialized members in Option<>.

 * Initializing the behavior and lookup members as needed from
   TryFromEnv implementations which require these members.

Follow-up CLs will move TryFromEnv implementations to where the
data types are defined, removing many dependencies from the Fho crate.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1179955
Original-Revision: aaee3a4ee138e26a7ecddda05f1a7df1c3add1bf
GitOrigin-RevId: ced2d8e3c64333ae4b34a3bf54ab5e8aebfb0835
Change-Id: I408b0773a46d6386b11381c6db980d158d104e68