Observing Istio control plane

[hanahmily]

Istio control plane

These changes intend to add a new MAL rule and UI template to analyze and render Istio metrics exported by the Istio control plane(Istiod), main changes include：

• MAL rule file
• UI template file
• Add OpenTelemetry receiver to replace OpenCensus receiver
• Create metric tables or indices on the initial phase instead of runtime.
• Remove istio mixer receiver

Check list:

• Update the documentation to include this new feature.
• If it's UI related, attach the screenshots below.
• If this pull request closes/resolves/fixes an existing issue, replace the issue number. Closes Support Istio control panel metrics. #5810 .
• Update the CHANGES log.

[hanahmily]

UI screenshot:

[codecov]

Codecov Report

Merging #5835 (1c1144b) into master (ec24c03) will decrease coverage by 9.45%.
The diff coverage is 48.61%.

@@             Coverage Diff              @@
##             master    #5835      +/-   ##
============================================
- Coverage     51.22%   41.76%   -9.46%     
+ Complexity     3497     2898     -599     
============================================
  Files          1661      902     -759     
  Lines         35659    22527   -13132     
  Branches       3910     2175    -1735     
============================================
- Hits          18266     9409    -8857     
+ Misses        16485    12321    -4164     
+ Partials        908      797     -111     

Impacted Files	Coverage Δ	Complexity Δ
...meter/analyzer/dsl/ExpressionParsingException.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...e/skywalking/oap/server/receiver/otel/Handler.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
.../receiver/otel/HandlerInitializationException.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...server/receiver/otel/OtelMetricReceiverConfig.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...server/receiver/otel/OtelMetricReceiverModule.java	66.66% <ø> (ø)	1.00 <0.00> (?)
...g/oap/server/receiver/otel/oc/OCMetricHandler.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...storage/plugin/jdbc/h2/dao/H2MetadataQueryDAO.java	49.34% <0.00%> (ø)	12.00 <0.00> (ø)
...rver/receiver/otel/OtelMetricReceiverProvider.java	16.66% <20.00%> (ø)	3.00 <3.00> (?)
...king/oap/meter/analyzer/prometheus/rule/Rules.java	58.33% <42.85%> (-8.34%)	3.00 <0.00> (ø)
.../skywalking/oap/meter/analyzer/dsl/Expression.java	65.62% <50.00%> (-4.97%)	5.00 <1.00> (ø)
... and 1229 more

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[wu-sheng]

Look like tests fail, please recheck or rerun.

[wu-sheng]

I have feeling whether this PR creating too many metrics to cause the unstable.

[hanahmily]

I have feeling whether this PR creating too many metrics to cause the unstable.

Yep, I also fall in with that. How about disabling Istio relevant tables generation in e2e since there is not a single test case for it. That means we don't have a test flow to guarantee whether all of the metrics work together, does it bring and concerns to you?

[wu-sheng]

LGTM