[core] Allow blob inline fields without blob-field

[leaves12138]

Purpose

blob-descriptor-field and blob-view-field already fully describe descriptor/view BLOB semantics, so users should not need to repeat those fields in blob-field.

Changes

• Relax schema validation so blob-descriptor-field and blob-view-field no longer need to be subsets of blob-field.
• Treat fields listed in blob-descriptor-field or blob-view-field as BLOB fields during Flink and Spark table creation.
• Keep the old style compatible: configuring the same field in blob-field still works.
• Update docs and generated core option descriptions.
• Replace old failure tests with coverage for descriptor/view fields without blob-field.

Tests

• mvn -pl paimon-core -am -Pfast-build -DfailIfNoTests=false -Dtest=BlobTableTest#testBlobInlineFieldCanDeclareBlobWithoutBlobField test
• mvn -pl paimon-flink/paimon-flink-common -am -Pfast-build -DfailIfNoTests=false -Dtest=BlobTableITCase#testWriteBlobViewWithBuiltInFunction+testBlobInlineFieldCanDeclareBlobWithoutBlobField test
• mvn -Pspark3 -pl paimon-spark/paimon-spark-common,paimon-spark/paimon-spark3-common,paimon-spark/paimon-spark-ut -am -Pfast-build -DfailIfNoTests=false -DwildcardSuites=org.apache.paimon.spark.sql.BlobTestWithV2Write -Dtest=none test
• hugo -b "" --quiet
• git diff --check
• JAVA_HOME=/opt/jdk-11.0.18.jdk/Contents/Home mvn -pl paimon-flink/paimon-flink-common -am -Pflink-2.2 -Pfast-build -DskipTests compile