catalog/traffic-policies: add error codes

[shashankram]

Description:
Adds error codes for inbound and outbound
traffic policy related errors.

Also makes the logging of resource names consistent.

Part of #2866

Signed-off-by: Shashank Ram shashr2204@gmail.com

Affected area:

Functional Area
Other	[X]

Please answer the following questions with yes/no.

1. Does this change contain code from or inspired by another project? no

   • Did you notify the maintainers and provide attribution?

2. Is this a breaking change? no

[codecov-commenter]

Codecov Report

Merging #3717 (4af79f1) into main (0322387) will decrease coverage by 0.09%.
The diff coverage is 38.55%.

@@            Coverage Diff             @@
##             main    #3717      +/-   ##
==========================================
- Coverage   67.65%   67.56%   -0.10%     
==========================================
  Files         181      182       +1     
  Lines        8772     8818      +46     
==========================================
+ Hits         5935     5958      +23     
- Misses       2804     2827      +23     
  Partials       33       33              

Flag	Coverage Δ
unittests	67.56% <38.55%> (-0.10%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cmd/osm-controller/log_handler.go	77.77% <0.00%> (-6.23%)	⬇️
cmd/osm-controller/osm-controller.go	13.33% <0.00%> (-0.19%)	⬇️
pkg/catalog/egress.go	83.89% <0.00%> (-3.72%)	⬇️
pkg/catalog/inbound_traffic_policies.go	78.81% <0.00%> (-4.23%)	⬇️
pkg/catalog/outbound_traffic_policies.go	83.24% <16.66%> (-4.12%)	⬇️
pkg/envoy/lds/gateway.go	84.44% <100.00%> (+1.51%)	⬆️
pkg/envoy/lds/inmesh.go	78.66% <100.00%> (+1.42%)	⬆️
pkg/errcode/errcode.go	100.00% <100.00%> (ø)
pkg/service/service.go	100.00% <100.00%> (ø)
... and 1 more

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