remove random integer in favor of random int (#10568)

related to
- #10520

# Description
this PR is a followup to #10520
and removes the `random integer` command completely, in favor of `random
int`.

# User-Facing Changes
`random integer` has been fully moved to `random int`
```nushell
> random integer 0..1
Error: nu::parser::extra_positional

  × Extra positional argument.
   ╭─[entry #1:1:1]
 1 │ random integer 0..1
   ·        ───┬───
   ·           ╰── extra positional argument
   ╰────
  help: Usage: random
```

# Tests + Formatting
tests have been moved from
`crates/nu-command/tests/commands/random/integer.rs` to
`crates/nu-command/tests/commands/random/int.rs`

# After Submitting
mention in 0.87.0 release notes

crates/nu-command/src/default_context.rs

@@ -372,7 +372,6 @@ pub fn add_shell_command_context(mut engine_state: EngineState) -> EngineState {
             RandomDice,
             RandomFloat,
             RandomInt,
-            RandomInteger,
             RandomUuid,
         };
 

crates/nu-command/src/random/mod.rs

@@ -3,7 +3,6 @@ mod chars;
 mod dice;
 mod float;
 mod int;
-mod integer;
 mod random_;
 mod uuid;
 
@@ -12,6 +11,5 @@ pub use self::chars::SubCommand as RandomChars;
 pub use self::dice::SubCommand as RandomDice;
 pub use self::float::SubCommand as RandomFloat;
 pub use self::int::SubCommand as RandomInt;
-pub use self::integer::SubCommand as RandomInteger;
 pub use self::uuid::SubCommand as RandomUuid;
 pub use random_::RandomCommand as Random;