Added test for replicationTaskExecutor: execute

[abhishekj720]

Description:
Contains unit tests for the domainReplicationTaskExecutorImpl's Execute method, covering domain creation, update, name/UUID collision, and handling of unsupported domain operations.
The tests utilize mocking to simulate DomainManager interactions.

Why?:
Improved test coverage for domain replication task execution ensures robust handling of domain operations across different scenarios.

How did you test it?:
The added unit tests were executed locally, with all tests passing. Mocks were employed to simulate the DomainManager interactions.

Potential risks:
Minimal risk is associated with this PR as it primarily adds unit tests without altering the core logic of domain replication task execution.

[codecov]

Codecov Report

Merging #5754 (f40b431) into master (856145b) will increase coverage by 0.12%.
Report is 1 commits behind head on master.
The diff coverage is n/a.

❗ Current head f40b431 differs from pull request most recent head 64b4c07. Consider uploading reports for the commit 64b4c07 to get more accurate results

Additional details and impacted files

see 4 files with indirect coverage changes

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[coveralls]

Pull Request Test Coverage Report for Build 018e1b28-6edc-4a2a-a6c7-b2b11a42641b

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 130 unchanged lines in 20 files lost coverage.
• Overall coverage decreased (-0.04%) to 63.228%

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Files with Coverage Reduction	New Missed Lines	%
common/task/weighted_round_robin_task_scheduler.go	2	89.05%
common/persistence/sql/sqlplugin/mysql/db.go	2	79.49%
common/persistence/sql/common.go	2	46.75%
common/persistence/sql/sql_task_store.go	2	54.32%
common/persistence/sql/sqlplugin/mysql/task.go	2	73.68%
common/util.go	2	91.69%
common/persistence/executionManager.go	2	78.59%
common/membership/hashring.go	2	82.23%
common/persistence/nosql/nosqlplugin/cassandra/workflow.go	3	71.41%
common/task/fifo_task_scheduler.go	4	80.41%

Totals
Change from base Build 018e1af5-7c55-428d-9cce-978e3813e7da:	-0.04%
Covered Lines:	92692
Relevant Lines:	146599

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💛 - Coveralls

[taylanisikdemir]

let's rename the files with snake_case

[abhishekj720]

it is filename_test.
If we change even the file name to snake case, it will be inconsistent throughout.