[fix](iceberg) Allow disabling REST catalog view operations

[xylaaaaa]

What problem does this PR solve?

Some Iceberg REST catalog implementations expose table APIs but fail or reject view APIs. Doris currently calls ViewCatalog.listViews() while listing tables when the underlying Iceberg catalog implements ViewCatalog, so SHOW TABLES and table metadata loading can fail even when table listing/loading works.

This PR adds a REST catalog property to disable view operations when needed, while keeping the existing default behavior enabled.

Changes

• Add iceberg.rest.view-enabled to IcebergRestProperties, defaulting to true.
• Gate Iceberg view operations in IcebergMetadataOps for REST catalogs when the property is set to false.
• Add unit coverage for the new property and for skipping listViews() in table listing.

Check List

• mvn -pl fe-core -am -Dtest=IcebergRestPropertiesTest,IcebergMetadataOpTest -Dcheckstyle.skip=true -DfailIfNoTests=false -Dmaven.build.cache.enabled=false test

[hello-stephen]

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Please clearly describe your PR:

1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
2. Which behaviors were modified. What was the previous behavior, what is it now, why was it modified, and what possible impacts might there be.
3. What features were added. Why was this function added?
4. Which code was refactored and why was this part of the code refactored?
5. Which functions were optimized and what is the difference before and after the optimization?

[Copilot]

Pull request overview

Adds a REST-catalog-specific switch to skip Iceberg view operations so Doris can still list/load tables against REST catalog implementations that don’t support (or reject) view APIs.

Changes:

• Introduces iceberg.rest.view-enabled (default true) in IcebergRestProperties.
• Gates view-related calls in IcebergMetadataOps behind the new property for REST catalogs.
• Adds unit tests covering the property behavior and verifying listViews() is skipped when disabled.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
fe/fe-core/src/main/java/org/apache/doris/datasource/property/metastore/IcebergRestProperties.java	Adds the new REST property and accessor (isIcebergRestViewEnabled()).
fe/fe-core/src/main/java/org/apache/doris/datasource/iceberg/IcebergMetadataOps.java	Centralizes view capability logic via isViewCatalogEnabled() and uses it to guard view operations.
fe/fe-core/src/test/java/org/apache/doris/datasource/property/metastore/IcebergRestPropertiesTest.java	Tests default enabled behavior and the false override.
fe/fe-core/src/test/java/org/apache/doris/datasource/iceberg/IcebergMetadataOpTest.java	Verifies listTableNames() skips listViews() when view ops are disabled for REST.

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[Copilot]

The DdlException message here becomes misleading when view ops are disabled via iceberg.rest.view-enabled=false: isViewCatalogEnabled() can return false even though catalog is a ViewCatalog. Consider updating the message (or branching) to indicate that view operations are disabled by configuration, not that the catalog lacks ViewCatalog support.

[xylaaaaa]

run buildall