[GOBBLIN-1789] Create Generic Iceberg Data Node to Support Different Types of Catalogs

[meethngala]

Dear Gobblin maintainers,

Please accept this PR. I understand that it will not be reviewed until I have checked off all the steps below!

JIRA

• My PR addresses the following Gobblin JIRA issues and references them in the PR title. For example, "[GOBBLIN-XXX] My Gobblin PR"
  • https://issues.apache.org/jira/browse/GOBBLIN-XXX
  • https://issues.apache.org/jira/browse/GOBBLIN-1789

Description

As part of supporting multiple Iceberg Catalogs, I am defining generic IcebergDataNode that will represent an Iceberg node in the Flow Graph for any type of Iceberg Catalog and not just Hive. Below are the changes added as part of this PR:

• Here are some details about my PR, including screenshots (if applicable):
• Added IcebergDataNode which takes a catalog Uri

Tests

• My PR adds the following unit tests OR does not need testing for this extremely good reason:
• Added unit tests

Commits

• My commits all reference JIRA issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "How to write a good git commit message":
  1. Subject is separated from body by a blank line
  2. Subject is limited to 50 characters
  3. Subject does not end with a period
  4. Subject uses the imperative mood ("add", not "adding")
  5. Body wraps at 72 characters
  6. Body explains "what" and "why", not "how"

[codecov-commenter]

Codecov Report

Merging #3646 (f9c6060) into master (26fd244) will decrease coverage by 0.02%.
The diff coverage is 63.63%.

@@             Coverage Diff              @@
##             master    #3646      +/-   ##
============================================
- Coverage     46.61%   46.60%   -0.02%     
  Complexity    10712    10712              
============================================
  Files          2133     2134       +1     
  Lines         83637    83648      +11     
  Branches       9300     9301       +1     
============================================
- Hits          38986    38981       -5     
- Misses        41095    41108      +13     
- Partials       3556     3559       +3     

Impacted Files	Coverage Δ
...s/flowgraph/datanodes/iceberg/IcebergDataNode.java	63.63% <63.63%> (ø)
...ava/org/apache/gobblin/fsm/FiniteStateMachine.java	73.48% <0.00%> (-3.04%)	⬇️
...lin/restli/throttling/ZookeeperLeaderElection.java	70.00% <0.00%> (-2.23%)	⬇️
...a/org/apache/gobblin/cluster/GobblinHelixTask.java	64.51% <0.00%> (-2.16%)	⬇️
...lin/elasticsearch/writer/FutureCallbackHolder.java	61.42% <0.00%> (-1.43%)	⬇️
.../modules/scheduler/GobblinServiceJobScheduler.java	63.03% <0.00%> (-1.43%)	⬇️
...main/java/org/apache/gobblin/util/HadoopUtils.java	30.29% <0.00%> (-0.66%)	⬇️
...lin/util/filesystem/FileSystemInstrumentation.java	100.00% <0.00%> (+7.14%)	⬆️
...a/org/apache/gobblin/util/limiter/NoopLimiter.java	60.00% <0.00%> (+20.00%)	⬆️

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[Will-Lo]

Looks good to me!