reflector: add helper function to the Store

[eliad-wiz]

Signed-off-by: Eliad Peller eliad.peller@wiz.io

Motivation

When using the reflector as local cache it's a bit expensive to clone the whole store when looking for a specific resource (assuming you don't know the ObjectRef in advance)

Solution

add some helper functions to the store struct to help finding a specific resource, and determining the current store size.

[clux]

I like this a lot, thanks for doing this! Have wanted extensions myself, but we were using dashmap at the time when we thought about this, and then it was hard (and cloning somewhere outside periodically was an OK tradeoff at the time).

Now it makes a lot more sense. So plus one. Minor comment in tests.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (main@3a3f77f). Click here to learn what that means.
The diff coverage is 100.00%.

Additional details and impacted files

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Impacted Files	Coverage Δ
kube-runtime/src/reflector/store.rs	96.47% <100.00%> (ø)

[eliad-wiz]

thanks for the quick review!