Rename random integer to random int (#10520)

# Description
Consistently use `int` for types and commands

h/t @1kinoti

Work for #10332

# User-Facing Changes
Deprecate `random integer` in the next release

New command `random int`

# Tests + Formatting
(-)

crates/nu-command/src/default_context.rs

@@ -370,6 +370,7 @@ pub fn add_shell_command_context(mut engine_state: EngineState) -> EngineState {
             RandomDecimal,
             RandomDice,
             RandomFloat,
+            RandomInt,
             RandomInteger,
             RandomUuid,
         };