Bump controller-tools version

[MrLarssonJr]

Description

Attempted to follow the instructions in the Running Operator Locally section of the developer documentation. When I attempted to run make install I encountered a nil pointer dereference error. (See stack trace below.)

Looking into the stack trace I realised the error originated from the controller-gen command from the controller-tools package. Looking into said package, I realised that the latest released version is v.0.14.0. The version referenced in Makefile were v0.11.2. I tried to change the referenced version to the latest version and it solved the nil pointer dereferenced issue and I could continue following the developer documentation.

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This PR has:

• been tested on a real K8S cluster to ensure creation of a brand new Druid cluster works.
• been tested for backward compatibility on a real K*S cluster by applying the changes introduced here on an existing Druid cluster. If there are any backward incompatible changes then they have been noted in the PR description.
• added comments explaining the "why" and the intent of the code wherever would not be obvious for an unfamiliar reader.
• added documentation for new or modified features or behaviors.

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Key changed/added files in this PR

• Makefile

[AdheipSingh]

Thanks @MrLarssonJr