[FEATURE] Gracefully handle views for proxying iceberg catalogs that don't support them

### Describe the feature

When proxying a catalog that doesn't support views we can return empty/absent results instead of failing on view requests

```
io.trino.spi.TrinoException: Failed to load view 'table'
at io.trino.plugin.iceberg.catalog.rest.TrinoRestCatalog.getIcebergView(TrinoRestCatalog.java:715)
at io.trino.plugin.iceberg.catalog.rest.TrinoRestCatalog.getView(TrinoRestCatalog.java:686)
at io.trino.plugin.iceberg.IcebergMetadata.getView(IcebergMetadata.java:3252)
at io.trino.plugin.base.classloader.ClassLoaderSafeConnectorMetadata.getView(ClassLoaderSafeConnectorMetadata.java:706)
at io.trino.tracing.TracingConnectorMetadata.getView(TracingConnectorMetadata.java:833)
at io.trino.metadata.MetadataManager.getViewInternal(MetadataManager.java:1603)
at io.trino.metadata.MetadataManager.getView(MetadataManager.java:1541)
at io.trino.tracing.TracingMetadata.getView(TracingMetadata.java:897)
at io.trino.sql.analyzer.StatementAnalyzer$Visitor.visitTable(StatementAnalyzer.java:2279)
at io.trino.sql.analyzer.StatementAnalyzer$Visitor.visitTable(StatementAnalyzer.java:522)
at io.trino.sql.tree.Table.accept(Table.java:60)
at io.trino.sql.tree.AstVisitor.process(AstVisitor.java:27)
at io.trino.sql.analyzer.StatementAnalyzer$Visitor.process(StatementAnalyzer.java:541)
at io.trino.sql.analyzer.StatementAnalyzer$Visitor.analyzeFrom(StatementAnalyzer.java:4920)
at io.trino.sql.analyzer.StatementAnalyzer$Visitor.visitQuerySpecification(StatementAnalyzer.java:3096)
at io.trino.sql.analyzer.StatementAnalyzer$Visitor.visitQuerySpecification(StatementAnalyzer.java:522)
at io.trino.sql.tree.QuerySpecification.accept(QuerySpecification.java:155)
at io.trino.sql.tree.AstVisitor.process(AstVisitor.java:27)
at io.trino.sql.analyzer.StatementAnalyzer$Visitor.process(StatementAnalyzer.java:541)
at io.trino.sql.analyzer.StatementAnalyzer$Visitor.process(StatementAnalyzer.java:549)
at io.trino.sql.analyzer.StatementAnalyzer$Visitor.visitQuery(StatementAnalyzer.java:1564)
at io.trino.sql.analyzer.StatementAnalyzer$Visitor.visitQuery(StatementAnalyzer.java:522)
at io.trino.sql.tree.Query.accept(Query.java:130)
at io.trino.sql.tree.AstVisitor.process(AstVisitor.java:27)
at io.trino.sql.analyzer.StatementAnalyzer$Visitor.process(StatementAnalyzer.java:541)
at io.trino.sql.analyzer.StatementAnalyzer.analyze(StatementAnalyzer.java:501)
at io.trino.sql.analyzer.StatementAnalyzer.analyze(StatementAnalyzer.java:490)
at io.trino.sql.analyzer.Analyzer.analyze(Analyzer.java:98)
at io.trino.sql.analyzer.Analyzer.analyze(Analyzer.java:87)
at io.trino.execution.SqlQueryExecution.analyze(SqlQueryExecution.java:289)
at io.trino.execution.SqlQueryExecution.(SqlQueryExecution.java:222)
at io.trino.execution.SqlQueryExecution$SqlQueryExecutionFactory.createQueryExecution(SqlQueryExecution.java:892)
at io.trino.dispatcher.LocalDispatchQueryFactory.lambda$createDispatchQuery$0(LocalDispatchQueryFactory.java:158)
at io.trino.$gen.Trino_474____20250410_190004_2.call(Unknown Source)
at com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:131)
at com.google.common.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:75)
at com.google.common.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:82)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1095)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:619)
at java.base/java.lang.Thread.run(Thread.java:1447)
Caused by: org.apache.iceberg.exceptions.RESTException: Unable to process: custom is not support view
at org.apache.iceberg.rest.ErrorHandlers$DefaultErrorHandler.accept(ErrorHandlers.java:224)
at org.apache.iceberg.rest.ErrorHandlers$ViewErrorHandler.accept(ErrorHandlers.java:161)
at org.apache.iceberg.rest.ErrorHandlers$ViewErrorHandler.accept(ErrorHandlers.java:145)
at org.apache.iceberg.rest.HTTPClient.throwFailure(HTTPClient.java:224)
at org.apache.iceberg.rest.HTTPClient.execute(HTTPClient.java:308)
at org.apache.iceberg.rest.BaseHTTPClient.get(BaseHTTPClient.java:77)
at org.apache.iceberg.rest.RESTClient.get(RESTClient.java:97)
at org.apache.iceberg.rest.RESTClient.get(RESTClient.java:80)
at org.apache.iceberg.rest.RESTSessionCatalog.loadView(RESTSessionCatalog.java:1276)
at io.trino.plugin.iceberg.catalog.rest.TrinoRestCatalog.getIcebergView(TrinoRestCatalog.java:709)
```

### Motivation

trino has hardcoded expectations that a rest catalog supports views

https://github.com/trinodb/trino/blob/474/core/trino-main/src/main/java/io/trino/sql/analyzer/StatementAnalyzer.java#L2279

this makes it not possible to proxy a non rest/ non view supporting catalog through trino.

### Describe the solution

We could either always be graceful or opt into graceful handling

### Additional context

_No response_

Start with TrinoRestCatalog.getView and getIcebergView, then review the linked StatementAnalyzer view lookup to understand the failing path. Define whether unsupported view requests should consistently return absent results or require an opt-in, and add coverage showing that proxying a catalog without view support no longer fails.

Written by the indexing model from the issue text.