Fix clippy isuses on rust 1.72

[clux]

resolver choice explicit

caused warning on regular cargo build:

warning: some crates are on edition 2021 which defaults to `resolver = "2"`, but virtual workspaces default to `resolver = "1"`
note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest

(we can't use resolver 2 atm due to the peer dependency on k8s-openapi and its features)

& without explicit lifetime

caused:

`&` without an explicit lifetime name cannot be used here
warning: `&` without an explicit lifetime name cannot be used here
   --> kube-client/src/client/auth/oidc.rs:155:28
    |
155 |     const CONFIG_ID_TOKEN: &str = "id-token";
    |                            ^
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #115010 <https://github.com/rust-lang/rust/issues/115010>
    = note: `#[warn(elided_lifetimes_in_associated_constant)]` on by default
help: use the `'static` lifetime
    |
155 |     const CONFIG_ID_TOKEN: &'static str = "id-token";
    |                             +++++++

[codecov]

Codecov Report

Merging #1288 (dc556e1) into main (9685bc1) will decrease coverage by 0.09%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1288      +/-   ##
==========================================
- Coverage   72.27%   72.19%   -0.09%     
==========================================
  Files          75       75              
  Lines        6259     6258       -1     
==========================================
- Hits         4524     4518       -6     
- Misses       1735     1740       +5     

Files Changed	Coverage Δ
kube-client/src/client/auth/oidc.rs	57.24% <ø> (+0.39%)	⬆️
kube/src/mock_tests.rs	97.87% <ø> (ø)

... and 2 files with indirect coverage changes