go.mod: bump sigs.k8s.io/controller-runtime from 0.15.1 to 0.16.0

[mythi]

Closes: #1505

[codecov-commenter]

Codecov Report

Merging #1507 (800c887) into main (6861ef5) will not change coverage.
The diff coverage is n/a.

❗ Current head 800c887 differs from pull request most recent head 60530ec. Consider uploading reports for the commit 60530ec to get more accurate results

@@           Coverage Diff           @@
##             main    #1507   +/-   ##
=======================================
  Coverage   50.04%   50.04%           
=======================================
  Files          43       43           
  Lines        4884     4884           
=======================================
  Hits         2444     2444           
  Misses       2301     2301           
  Partials      139      139           

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