clippy: zk-token-sdk lints

[brooksprumo]

Problem

There are new nightly clippy lints in the zk-token-sdk crate. Refer to #34626 for more information.

warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
  --> zk-token-sdk/src/instruction/batched_range_proof/mod.rs:62:22
   |
62 |         commitments: &Vec<&PedersenCommitment>,
   |                      ^^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[&PedersenCommitment]`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
   = note: `#[warn(clippy::ptr_arg)]` on by default

warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
  --> zk-token-sdk/src/instruction/batched_range_proof/mod.rs:63:18
   |
63 |         amounts: &Vec<u64>,
   |                  ^^^^^^^^^ help: change this to: `&[u64]`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg

warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
  --> zk-token-sdk/src/instruction/batched_range_proof/mod.rs:64:22
   |
64 |         bit_lengths: &Vec<usize>,
   |                      ^^^^^^^^^^^ help: change this to: `&[usize]`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg

warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
  --> zk-token-sdk/src/instruction/batched_range_proof/mod.rs:65:19
   |
65 |         openings: &Vec<&PedersenOpening>,
   |                   ^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[&PedersenOpening]`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg

    Checking solana-clap-utils v1.18.0 (/Users/brooks/src/solana/clap-utils)
warning: `solana-zk-token-sdk` (lib) generated 4 warnings

Summary of Changes

Fix 'em.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (09a94b8) 81.8% compared to head (c77887d) 81.8%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #34633     +/-   ##
=========================================
- Coverage    81.8%    81.8%   -0.1%     
=========================================
  Files         824      824             
  Lines      222260   222260             
=========================================
- Hits       181893   181888      -5     
- Misses      40367    40372      +5     

[samkim-crypto]

Looks good to me, thanks!