[SPARK-47523][SQL] Replace deprecated JsonParser#getCurrentName with JsonParser#currentName

[LuciferYang]

What changes were proposed in this pull request?

This pr replaces the use of JsonParser#getCurrentName with JsonParser#currentName in Spark code, as JsonParser#getCurrentName has been deprecated since jackson 2.17.

https://github.com/FasterXML/jackson-core/blob/8fba680579885bf9cdae72e93f16de557056d6e3/src/main/java/com/fasterxml/jackson/core/JsonParser.java#L1521-L1551

    /**
     * Deprecated alias of {@link #currentName()}.
     *
     * @return Name of the current field in the parsing context
     *
     * @throws IOException for low-level read issues, or
     *   {@link JsonParseException} for decoding problems
     *
     * @deprecated Since 2.17 use {@link #currentName} instead.
     */
    @Deprecated
    public abstract String getCurrentName() throws IOException;

    /**
     * Method that can be called to get the name associated with
     * the current token: for {@link JsonToken#FIELD_NAME}s it will
     * be the same as what {@link #getText} returns;
     * for field values it will be preceding field name;
     * and for others (array values, root-level values) null.
     *
     * @return Name of the current field in the parsing context
     *
     * @throws IOException for low-level read issues, or
     *   {@link JsonParseException} for decoding problems
     *
     * @since 2.10
     */
    public String currentName() throws IOException {
        // !!! TODO: switch direction in 2.18 or later
        return getCurrentName();
    }

Why are the changes needed?

Clean up deprecated API usage.

Does this PR introduce any user-facing change?

No

How was this patch tested?

Pass GitHub Actions

Was this patch authored or co-authored using generative AI tooling?

No

[dongjoon-hyun]

+1, LGTM (Pending CIs).

[yaooqinn]

+1, LGTM.

Thank you. @LuciferYang

[dongjoon-hyun]

Merged to master for Apache Spark 4.0.0.
Thank you, @LuciferYang and @yaooqinn .