Dependency version upgrades and fixes

[unmarshall]

What type of PR is this?

/kind enhancement

What this PR does / why we need it:

• Upgrades k8s.io/* dependency versions to v0.34.2
• Upgrades sigs.k8s.io/controller-runtime to v0.22.4
• Upgrades github.com/stretchr/testify to v1.11.1
• Upgrades golang.org/x/net to v0.47.0 (indirect dependency upgrade to resolve a CVE)
• Upgrades github.com/samber/lo to v1.52.0
• Upgrades github.com/spf13/pflag to v1.0.10
• Upgrades helm.sh/helm/v3 to v3.19.2
• Introduces a convenient make tidy target
• Client: Native support for Server-Side Apply (SSA), Fake client was adapted to also implement SSA.
• Re-ran make generate and make generate-api-docs targets which resulted in some doc changes.

In addition to the above this PR also fixes:
An indirect dependency version issue with an explicit replace directive.
github.com/k3d-io/k3d/v5 pulls in github.com/rancher/wharfie which pulls in kubelet but with an incorrect version v0.0.0. A replace directive was added to fix that issue.

You can see the issue reported when you run go list -json -m -u -mod=readonly all command on operator go module.
You will see the following error:

go: k8s.io/[email protected]: invalid version: unknown revision v0.0.0

Which issue(s) this PR fixes:

Fixes #264

Special notes for your reviewer:

Does this PR introduce a API change?

The following dependencies are updated:
- `k8s.io/*`: `v0.33.1` -> `v0.34.2`
- `sigs.k8s.io/controller-runtime`: `v0.21.0` -> `v0.22.4`
- `github.com/stretchr/testify`: `v1.10.0` -> `v1.11.1`
- `helm.sh/helm/v3`:  `v3.19.0` -> `v3.19.2`
- `github.com/samber/lo`: `v1.51.0` -> `v1.52.0`
- `github.com/spf13/pflag`:  `v1.0.9` -> `v1.0.10`
- `golang.org/x/net`: -> v0.47.0
- Introduces a convenience `make tidy` target
- Fixes indirect `kubelet` dependency version

Additional documentation e.g., enhancement proposals, usage docs, etc.:

None

[renormalize]

thanks!