[Chore][Core] Remove useless parameter in ConfigBuilder

[Hisoka-X]

Purpose of this pull request

Remove useless parameter in ConfigBuilder

Does this PR introduce any user-facing change?

How was this patch tested?

Check list

• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/seatunnel/tree/dev/docs
• If you are contributing the connector code, please check that the following files are updated:
  1. Update plugin-mapping.properties and add new connector information in it
  2. Update the pom file of seatunnel-dist
  3. Add ci label in label-scope-conf
  4. Add e2e testcase in seatunnel-e2e
  5. Update connector plugin_config

[Copilot]

Pull Request Overview

This PR removes an unused isJson parameter from various ConfigBuilder.of methods and updates all call sites to the new two-argument signature.

• Dropped the third boolean flag (isJson) from ConfigBuilder.of calls in server and starter modules.
• Removed obsolete overloaded methods in the e2e ConfigBuilder utility.
• Aligned method signatures across engine, core-starter, and e2e-common modules.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
seatunnel-engine/…/RestUtil.java	Updated buildConfig and buildConfigList to call two-arg of
seatunnel-e2e/…/ConfigBuilder.java (e2e-common)	Removed of(Map, boolean) and of(Map) overloads
seatunnel-core/…/ConfigBuilder.java (core-starter)	Simplified of(Map) to delegate to two-arg of

Comments suppressed due to low confidence (3)

seatunnel-engine/seatunnel-engine-server/src/main/java/org/apache/seatunnel/engine/server/utils/RestUtil.java:76

• Consider adding unit tests for buildConfig and buildConfigList to verify that removing the isJson parameter does not alter JSON-based parsing behavior.

        return ConfigBuilder.of(objectMap, isEncrypt);

seatunnel-core/seatunnel-core-starter/src/main/java/org/apache/seatunnel/core/starter/utils/ConfigBuilder.java:106

• [nitpick] The removal of the isJson flag changes default parsing assumptions; please update the JavaDoc to explain how input maps are interpreted and what formats are supported.

    public static Config of(@NonNull Map<String, Object> objectMap, boolean isEncrypt) {

seatunnel-e2e/seatunnel-e2e-common/src/test/java/org/apache/seatunnel/e2e/common/util/ConfigBuilder.java:71

• Since the of(Map, boolean) overload was removed, ensure all test utilities that rely on encrypted parsing are updated or consider reintroducing a dedicated method for encryption scenarios to keep tests clear.

    public static Config of(@NonNull Map<String, Object> objectMap) {