HDDS-3779. Add csi interface documents to show how to use ozone csi

[maobaolong]

What changes were proposed in this pull request?

Add csi interface documents to show how to use ozone csi

What is the link to the Apache JIRA

https://jira.apache.org/jira/browse/HDDS-3779

How was this patch tested?

No need, only docs changed.

[codecov-commenter]

Codecov Report

Merging #1059 into master will increase coverage by 1.00%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #1059      +/-   ##
============================================
+ Coverage     69.48%   70.49%   +1.00%     
- Complexity     9110     9249     +139     
============================================
  Files           961      961              
  Lines         48132    48130       -2     
  Branches       4672     4676       +4     
============================================
+ Hits          33446    33930     +484     
+ Misses        12468    11950     -518     
- Partials       2218     2250      +32     

Impacted Files	Coverage Δ	Complexity Δ
.../org/apache/hadoop/hdds/scm/pipeline/Pipeline.java	85.71% <100.00%> (+0.20%)	44.00 <0.00> (+1.00)
.../org/apache/hadoop/ozone/om/helpers/OmKeyInfo.java	86.25% <100.00%> (+0.33%)	42.00 <0.00> (+2.00)
...adoop/ozone/om/helpers/OmKeyLocationInfoGroup.java	75.60% <100.00%> (+1.25%)	12.00 <2.00> (+1.00)
...g/apache/hadoop/ozone/om/helpers/OzoneAclUtil.java	81.91% <100.00%> (+1.23%)	39.00 <4.00> (+2.00)
...adoop/ozone/om/request/key/OMKeyCommitRequest.java	97.00% <100.00%> (ø)	18.00 <0.00> (+1.00)
...p/ozone/om/ratis/utils/OzoneManagerRatisUtils.java	67.44% <0.00%> (-19.13%)	39.00% <0.00%> (ø%)
...che/hadoop/ozone/om/ratis/OMRatisSnapshotInfo.java	83.33% <0.00%> (-10.67%)	7.00% <0.00%> (-5.00%)
...ache/hadoop/ozone/om/codec/S3SecretValueCodec.java	90.90% <0.00%> (-9.10%)	3.00% <0.00%> (-1.00%)
.../apache/hadoop/ozone/om/OMDBCheckpointServlet.java	66.26% <0.00%> (-4.27%)	8.00% <0.00%> (-2.00%)
...zone/container/common/volume/MutableVolumeSet.java	75.00% <0.00%> (-0.90%)	39.00% <0.00%> (-1.00%)
... and 36 more

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[maobaolong]

This PR only modify the documents, it cannot fail the tests, so we should collect these fail test and mark as ignore, we can open it until we prove the test recover to strong and better.

[INFO] Running org.apache.hadoop.ozone.client.rpc.TestDeleteWithSlowFollower
[ERROR] Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 28.865 s <<< FAILURE! - in org.apache.hadoop.ozone.client.rpc.TestDeleteWithSlowFollower
[ERROR] testDeleteKeyWithSlowFollower(org.apache.hadoop.ozone.client.rpc.TestDeleteWithSlowFollower)  Time elapsed: 0.152 s  <<< FAILURE!
java.lang.AssertionError
	at org.junit.Assert.fail(Assert.java:86)
	at org.junit.Assert.assertTrue(Assert.java:41)
	at org.junit.Assert.assertNotNull(Assert.java:621)
	at org.junit.Assert.assertNotNull(Assert.java:631)
	at org.apache.hadoop.ozone.client.rpc.TestDeleteWithSlowFollower.testDeleteKeyWithSlowFollower(TestDeleteWithSlowFollower.java:225)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
	at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)

[maobaolong]

@elek Please take a look at this PR, i think this document can be useful to learn how to use Ozone CSI interface.

[elek]

+1 Thanks to write it down.

Minore comment: I would add some more hints to install the cluster (use the right directory). (See below).

[maobaolong]

@elek Thank you for your suggestion, I've accepted and committed.

[elek]

+1 Thanks the update @maobaolong