Add custom alerts and dashboards

[steven-sheehy]

Detailed description:

• Add custom PrometheusRule alerts for gRPC, Importer and REST
• Add gRPC API dashboard
• Add REST API dashboard
• Add balances and events to the Importer dashboard
• Add namespace filter to Mirror Node dashboards
• Add hedera.mirror.parse.duration metric for balances
• Add hedera.mirror.parse.latency metric for balances
• Add record/balance file age single stat and graph to importer dashboard
• Change dashboards to use the new dynamic $__rate_interval variable instead of our manually specified interval approach
• Change tests to use Redis 5.0.9 to match our VM environments
• Disable kubelet monitoring in GKE since it isn't possible and generates false alerts
• Fix docker-compose not working due to lack of Redis
• Remove non-working Swagger dashboard
• Remove Go as code scanning language as it fails without Go code in master

Which issue(s) this PR fixes:
Fixes #660

Special notes for your reviewer:
Vast majority of the +9K/-3K changes are dashboard related changes and can be ignored.

Checklist

• Documentation added
• Tests updated

[codecov]

Codecov Report

Merging #1170 into master will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #1170      +/-   ##
============================================
+ Coverage     87.99%   88.05%   +0.05%     
- Complexity      234      235       +1     
============================================
  Files           220      220              
  Lines          5424     5440      +16     
  Branches        602      603       +1     
============================================
+ Hits           4773     4790      +17     
+ Misses          456      455       -1     
  Partials        195      195              

Impacted Files	Coverage Δ	Complexity Δ
...rter/parser/balance/AccountBalancesFileLoader.java	93.57% <100.00%> (+0.82%)	0.00 <0.00> (ø)
...r/grpc/retriever/PollingTopicMessageRetriever.java	96.15% <0.00%> (-1.93%)	10.00% <0.00%> (ø%)
...rror/grpc/listener/SharedPollingTopicListener.java	98.03% <0.00%> (+3.92%)	6.00% <0.00%> (+1.00%)

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[Nana-EC]

LGTM