fix: Fix compilation failures when not enabling default features

[sbernauer]

Context: Bumping operator-rs in containerdebug

Problem

Some of our crates (notable stackable-operator) produce lot's of compilation errors when being pulled in with no default features, e.g.

stackable-operator = { git = "https://github.com/stackabletech/operator-rs", tag = "stackable-operator-0.106.2", default-features = false }

produces error: could not compile stackable-operator (lib) due to 237 previous errors

stackable-telemetry is even worse, as it is broken using default features:

stackable-telemetry = {git = "https://github.com/stackabletech/operator-rs", tag = "stackable-operator-0.106.2" }

causes

error[E0432]: unresolved import `clap`
  --> /home/sbernauer/.cargo/git/checkouts/operator-rs-10d25a4c6a1c49cf/f9b117c/crates/stackable-telemetry/src/tracing/mod.rs:12:5
   |
12 | use clap;
   |     ^^^^ no external crate `clap`

For more information about this error, try `rustc --explain E0432`.
error: could not compile `stackable-telemetry` (lib) due to 1 previous error

Fix

This PR fixes the stackable-operator and stackable-telemetry by making mandatory features actually mandatory.
I also added pre-commit checks to prevent this from happening again.

With this fix I can now pull in exactly what I need in containerdebug:

stackable-shared = {git = "https://github.com/stackabletech/operator-rs", branch = "fix/crate-features" }
stackable-telemetry = {git = "https://github.com/stackabletech/operator-rs", branch = "fix/crate-features", features = ["clap"] }

Definition of Done Checklist

• Not all of these items are applicable to all PRs, the author should update this template to only leave the boxes in that are relevant
• Please make sure all these things are done and tick the boxes

Author

• Changes are OpenShift compatible
• CRD changes approved
• CRD documentation for all fields, following the style guide.
• Integration tests passed (for non trivial changes)
• Changes need to be "offline" compatible

Reviewer

• Code contains useful comments
• Code contains useful logging statements
• (Integration-)Test cases added
• Documentation added or updated. Follows the style guide.
• Changelog updated
• Cargo.toml only contains references to git tags (not specific commits or branches)

Acceptance

• Feature Tracker has been updated
• Proper release label has been added