clippy: Allow enum variant names in generated google.bigtable.v2

[brooksprumo]

Problem

New clippy lints are preventing us from upgrading our nightly rust in #34118. Here's the build: https://buildkite.com/solana-labs/solana/builds/104515#018bd9d3-5bfd-41b5-9cc2-2a9d810c0360. Here's what the error looks like:

error: variant name ends with the enum's name
   --> /solana/storage-bigtable/proto/google.bigtable.v2.rs:418:9
    |
418 |         PassAllFilter(bool),
    |         ^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names
    = note: `-D clippy::enum-variant-names` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(clippy::enum_variant_names)]`

Summary of Changes

Explicitly allow this clippy lint.

[codecov]

Codecov Report

Merging #34126 (71d9116) into master (32993b2) will increase coverage by 0.0%.
Report is 1355 commits behind head on master.
The diff coverage is 90.9%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #34126      +/-   ##
==========================================
  Coverage    81.8%    81.9%              
==========================================
  Files         766      818      +52     
  Lines      209077   219938   +10861     
==========================================
+ Hits       171130   180227    +9097     
- Misses      37947    39711    +1764