[INLONG-11495][Sort] Add end-to-end test for Kafka connector v1.18

[PeterZh6]

Fixes #11495
Fixes #11553

Motivation

To verify the correctness of #11494 in a formal way.
To fix the problem of #11494, which is documented in #11553

Modifications

For #11495, added end2end test for Kafka connector by producing kafka message with kafka-clients dependency and extract the information with Kafka connector introduced by #11494. To better automate the whole process, the result is loaded to Elasticsearch7 with the existing elsasticsearch7-inlong connector. The result is then retrieved by elasticsearch client dependency and compared with the expected result.

Also, some unused dependecies are removed and the test connects to elasticsearch with co.elastic instead of high-level client.

For #11553, the package name in meta-inf of the Kafka connnector is corrected, so that the DynamicFactory class can work properly.

Verifying this change

• This change is a trivial rework/code cleanup without any test coverage.

• This change is already covered by existing tests, such as:

• This change added tests and can be verified as follows:

switch to inlong/inlong-sort/sort-end-to-end-tests/sort-end-to-end-tests-v1.18 directory and run mvn clean test -Dtest=Kafka2Elasticsearch7Test

Documentation

• Does this pull request introduce a new feature? No
• If yes, how is the feature documented? N/A
• If a feature is not applicable for documentation, explain why? Test introduced. No need for documentation

[dockerzhang]

@vernedeng PTAL