Bump Flint version to 0.3.0

[penghuo]

Description

Bump Flint current version to 0.3.0 in main branch

Testing
Version in artifact name:

$ sbt clean assembly
$ find . -name "*-0.3.0-SNAPSHOT.jar"
./spark-sql-application/target/scala-2.12/sql-job-assembly-0.3.0-SNAPSHOT.jar
./flint-spark-integration/target/scala-2.12/flint-spark-integration-assembly-0.3.0-SNAPSHOT.jar
./ppl-spark-integration/target/scala-2.12/ppl-spark-integration-assembly-0.3.0-SNAPSHOT.jar

Version in Flint index metadata (currently version field represents Flint code version. We can add another field specVersion for specification version as needed):

./bin/spark-sql --jars /Users/penghuo/oss/opensearch-spark/flint-spark-integration/target/scala-2.12/flint-spark-integration-assembly-0.3.0-SNAPSHOT.jar --conf spark.sql.extensions=org.opensearch.flint.spark.FlintSparkExtensions

{
  "flint_spark_catalog_default_http_logs_full_skipping_index": {
    "aliases": {},
    "mappings": {
      "_meta": {
        "latestId": "ZmxpbnRfc3BhcmtfY2F0YWxvZ19kZWZhdWx0X2h0dHBfbG9nc19mdWxsX3NraXBwaW5nX2luZGV4",
        "kind": "skipping",
        "indexedColumns": [
          {
            "columnType": "int",
            "kind": "VALUE_SET",
            "parameters": {
              "max_size": "100"
            },
            "columnName": "status"
          }
        ],
        "name": "flint_spark_catalog_default_http_logs_full_skipping_index",
        "options": {
          "auto_refresh": "false",
          "incremental_refresh": "false"
        },
        "source": "spark_catalog.default.http_logs_full",
        "version": "0.3.0",
        "properties": {}
      },
      "properties": {
        "file_path": {
          "type": "keyword"
        },
        "status": {
          "type": "integer"
        }
      }
    }
  }
}

Issues Resolved

#254

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[noCharger]

Just curious, shall we also mention compatibility with the SQL plugin? Assume we will delete the query parameter from the main entry point args.

[penghuo]

good point,
does it impact 0.2.0, or only for 0.3.0?

[noCharger]

Since 0.2 has already been released, we can do 0.3.
SQL change - opensearch-project/sql#2519
Flint change - #253