[Enhancement] Unified Catalog support Paimon (backport #47398)

[mergify]

Why I'm doing:

Make unified catalog support paimon data sources.

example:

CREATE EXTERNAL CATALOG unified
PROPERTIES
(
    "type" = "unified",
    "unified.metastore.type" = "hive",
    "hive.metastore.uris" = "thrift://localhost:9083",
    "paimon.catalog.warehouse" = "hdfs://127.0.0.1:9000/paimon",
);

What I'm doing:

Fixes #issue

What type of PR is this:

• BugFix
• Feature
• Enhancement
• Refactor
• UT
• Doc
• Tool

Does this PR entail a change in behavior?

• Yes, this PR will result in a change in behavior.
• No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

• Interface/UI changes: syntax, type conversion, expression evaluation, display information
• Parameter changes: default values, similar parameters but with different default values
• Policy changes: use new policy to replace old one, functionality automatically enabled
• Feature removed
• Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

• I have added test cases for my bug fix or my new feature
• This pr needs user documentation (for new or modified features or behaviors)
  • I have added documentation for my new feature or new function
• This is a backport pr

Bugfix cherry-pick branch check:

• I have checked the version labels which the pr will be auto-backported to the target branch
  • 3.3
  • 3.2
  • 3.1
  • 3.0
  • 2.5

---

This is an automatic backport of pull request #47398 done by [Mergify](https://mergify.com). ## Why I'm doing: Make unified catalog support paimon data sources.

example:

CREATE EXTERNAL CATALOG unified
PROPERTIES
(
    "type" = "unified",
    "unified.metastore.type" = "hive",
    "hive.metastore.uris" = "thrift://localhost:9083",
    "paimon.catalog.warehouse" = "hdfs://127.0.0.1:9000/paimon",
);

What I'm doing:

Fixes #issue

What type of PR is this:

• BugFix
• Feature
• Enhancement
• Refactor
• UT
• Doc
• Tool

Does this PR entail a change in behavior?

• Yes, this PR will result in a change in behavior.
• No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

• Interface/UI changes: syntax, type conversion, expression evaluation, display information
• Parameter changes: default values, similar parameters but with different default values
• Policy changes: use new policy to replace old one, functionality automatically enabled
• Feature removed
• Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

• I have added test cases for my bug fix or my new feature
• This pr needs user documentation (for new or modified features or behaviors)
  • I have added documentation for my new feature or new function
• This is a backport pr

[mergify]

Cherry-pick of 2e50513 has failed:

On branch mergify/bp/branch-3.3/pr-47398
Your branch is up to date with 'origin/branch-3.3'.

You are currently cherry-picking commit 2e50513c2d.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   fe/fe-core/src/main/java/com/starrocks/catalog/PaimonTable.java
	modified:   fe/fe-core/src/main/java/com/starrocks/connector/paimon/PaimonConnector.java
	modified:   fe/fe-core/src/main/java/com/starrocks/connector/unified/UnifiedConnector.java
	modified:   fe/fe-core/src/main/java/com/starrocks/connector/unified/UnifiedMetadata.java
	modified:   fe/fe-core/src/test/java/com/starrocks/catalog/PaimonTableTest.java
	modified:   fe/fe-core/src/test/java/com/starrocks/connector/unified/UnifiedConnectorTest.java

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   fe/fe-core/src/test/java/com/starrocks/connector/unified/UnifiedMetadataTest.java

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[mergify]

@mergify[bot]: Backport conflict, please reslove the conflict and resubmit the pr