injector: Idiomatic logging of error messages with log.Error().Err(err)

[draychev]

This PR rewrites log statements that attempt to log an err message using log.Error().Msgf(err) to using log.Error().Err(err).Msgf()

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Affected area:

• New Functionality [ ]
• Documentation [ ]
• Install [ ]
• Control Plane [ ]
• CLI Tool [ ]
• Certificate Management [ ]
• Networking [ ]
• Metrics [ ]
• SMI Policy [ ]
• Security [ ]
• Tests [ ]
• CI System [ ]
• Performance [ ]
• Other [ ]

Please answer the following questions with yes/no.

• Does this change contain code from or inspired by another project? If so, did you notify the maintainers and provide attribution?

[codecov-io]

Codecov Report

Merging #2348 (ec90995) into main (05677b0) will increase coverage by 0.01%.
The diff coverage is 36.36%.

@@            Coverage Diff             @@
##             main    #2348      +/-   ##
==========================================
+ Coverage   57.28%   57.29%   +0.01%     
==========================================
  Files         149      149              
  Lines        6653     6653              
==========================================
+ Hits         3811     3812       +1     
+ Misses       2837     2836       -1     
  Partials        5        5              

Impacted Files	Coverage Δ
pkg/catalog/routes.go	79.03% <20.00%> (ø)
pkg/injector/webhook.go	76.64% <25.00%> (ø)
pkg/injector/profiling.go	100.00% <100.00%> (ø)
pkg/envoy/route/config.go	96.03% <0.00%> (+0.79%)	⬆️

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[shashankram]

Some of these log messages predates zerolog :-)