function to read compacted topics

[315157973]

Fixes #5538

Motivation

Modifications

In function mode and sink mode, PulsarSource can read compacted topic。
By inputSpecs parameter, each topic can independently decide whether to read compacted

Verifying this change

unit test:
org.apache.pulsar.io.PulsarFunctionE2ETest#testReadCompactedFunction
org.apache.pulsar.io.PulsarFunctionE2ETest#testReadCompactedSink

Does this pull request potentially affect one of the following parts:

If yes was chosen, please highlight the changes

• Dependencies (does it add or upgrade a dependency): (yes / no)
• The public API: (yes / no)
• The schema: (yes / no / don't know)
• The default values of configurations: (yes / no)
• The wire protocol: (yes / no)
• The rest endpoints: (yes / no)
• The admin cli options: (yes / no)
• Anything that affects deployment: (yes / no / don't know)

Documentation

• Does this pull request introduce a new feature? (yes / no)
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)
• If a feature is not applicable for documentation, explain why?
• If a feature is not documented yet in this PR, please create a followup issue for adding the documentation

[jiazhai]

@jerrypeng @sijie Would you please help review this PR again?

[jiazhai]

/pulsarbot run-failure-checks

[jdimeo]

How does one configure their function to read from a compacted topic? the current documentation doesn't seem to mention it and it's not obvious looking at the code of this PR. Does it happen automatically? does readCompacted: true go into the user config properties?