chore: [iceberg] support Iceberg 1.9.1 (#2386)

Author: hsiang-c

.github/workflows/iceberg_spark_test.yml

@@ -46,7 +46,7 @@ jobs:
       matrix:
         os: [ubuntu-24.04]
         java-version: [11, 17]
-        iceberg-version: [{short: '1.8', full: '1.8.1'}]
+        iceberg-version: [{short: '1.8', full: '1.8.1'}, {short: '1.9', full: '1.9.1'}]
         spark-version: [{short: '3.5', full: '3.5.6'}]
         scala-version: ['2.13']
       fail-fast: false
@@ -85,7 +85,7 @@ jobs:
       matrix:
         os: [ubuntu-24.04]
         java-version: [11, 17]
-        iceberg-version: [{short: '1.8', full: '1.8.1'}]
+        iceberg-version: [{short: '1.8', full: '1.8.1'}, {short: '1.9', full: '1.9.1'}]
         spark-version: [{short: '3.5', full: '3.5.6'}]
         scala-version: ['2.13']
       fail-fast: false
@@ -124,7 +124,7 @@ jobs:
       matrix:
         os: [ubuntu-24.04]
         java-version: [11, 17]
-        iceberg-version: [{short: '1.8', full: '1.8.1'}]
+        iceberg-version: [{short: '1.8', full: '1.8.1'}, {short: '1.9', full: '1.9.1'}]
         spark-version: [{short: '3.5', full: '3.5.6'}]
         scala-version: ['2.13']
       fail-fast: false