Vendor gardener@1.75.0 and drop dependency injection functions

[shafeeqes]

How to categorize this PR?

/area open-source
/kind cleanup

What this PR does / why we need it:
The package controller-runtime/pkg/runtime/inject has been removed in controller-runtime v0.15. This package contained long deprecated injection functions (like InjectScheme, InjectLogger, InjectConfig, InjectClient, InjectCache, etc.).

The runtime injection functionality has been deprecated since Controller Runtime 0.10; all of the above fields can be passed from the Manager to structs or interfaces that need them.

Which issue(s) this PR fixes:
Part of gardener/gardener#7991

Special notes for your reviewer:

Release note:

The `security.gardener.cloud/pod-security-enforce` annotation in the ControllerRegistration is set to `baseline`. With this, the pods running in the extension namespace should comply with `baseline` pod-security standard.

[shafeeqes]

The security.gardener.cloud/pod-security-enforce annotation in the ControllerRegistration is set to baseline. With this, the pods running in the extension namespace should comply with baseline pod-security standard. See gardener/gardener#8099 for more details.
During release validation, we have to make sure that the pod can run with this standard, or we have to either change it to privileged or adapt the component.

[MartinWeindel]

/lgtm