build: fix clippy lints and MSRV check

[luizirber]

Rust 1.72 beta introduced new clippy lints that are failing on CI, most of them are easy to fix (remove as conversion), but the one changing

pub struct InnerStorage(Arc<Mutex<dyn Storage>>);

to

pub struct InnerStorage(Rc<RwLock<dyn Storage>>);

is a bit more involved. Still need to better evaluate how this will go with threads, but since it is an opaque type we can also change the internal representation without breaking semver.

#2629 introduced an MSRV bump to 1.64 on the test dependencies, added an extra argument --tests in the CI checks to verify test deps too.

[codecov]

Codecov Report

Merging #2680 (c52bd7b) into latest (c7c320f) will increase coverage by 0.02%.
The diff coverage is 23.07%.

@@            Coverage Diff             @@
##           latest    #2680      +/-   ##
==========================================
+ Coverage   85.23%   85.26%   +0.02%     
==========================================
  Files         133      133              
  Lines       15193    15179      -14     
  Branches     2612     2612              
==========================================
- Hits        12950    12942       -8     
+ Misses       1942     1936       -6     
  Partials      301      301              

Flag	Coverage Δ
hypothesis-py	25.81% <ø> (ø)
python	92.83% <ø> (ø)
rust	51.64% <23.07%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/core/src/ffi/cmd/compute.rs	0.00% <0.00%> (ø)
src/core/src/ffi/minhash.rs	0.00% <0.00%> (ø)
src/core/src/ffi/nodegraph.rs	0.00% <0.00%> (ø)
src/core/src/ffi/storage.rs	0.00% <0.00%> (ø)
src/core/src/sketch/minhash.rs	75.15% <0.00%> (-0.16%)	⬇️
src/core/src/storage.rs	70.83% <100.00%> (ø)

... and 8 files with indirect coverage changes

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