Monitored Resource: replace gke_container with k8s_container in SD exporter

[mayurkale22]

…porter

Fixes #1445

[songy23]

LGTM. Will this be a breaking change for users that already use "gke_container" resources?

[mayurkale22]

Yes, this is breaking change for existing user. SD also mentioned same in their release doc: https://cloud.google.com/monitoring/kubernetes-engine/migration#incompatible

[songy23]

Yes, this is breaking change for existing user. SD also mentioned same in their release doc: https://cloud.google.com/monitoring/kubernetes-engine/migration#incompatible

Please add an entry to CHANGELOG.md and point to the SD document.

[codecov-io]

Codecov Report

Merging #1467 into master will increase coverage by 0.02%.
The diff coverage is 50%.

@@             Coverage Diff              @@
##             master    #1467      +/-   ##
============================================
+ Coverage     82.39%   82.41%   +0.02%     
  Complexity     1542     1542              
============================================
  Files           235      235              
  Lines          7232     7229       -3     
  Branches        689      689              
============================================
- Hits           5959     5958       -1     
+ Misses         1060     1059       -1     
+ Partials        213      212       -1

Impacted Files	Coverage Δ	Complexity Δ
...rter/stats/stackdriver/StackdriverExportUtils.java	83% <0%> (+0.4%)	31 <0> (ø)	⬇️
...race/stackdriver/StackdriverV2ExporterHandler.java	89.44% <100%> (-0.1%)	40 <0> (ø)
...census/implcore/trace/export/SpanExporterImpl.java	93.15% <0%> (+1.36%)	8% <0%> (ø)	⬇️

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