[Refactor] Change the field type of service id to String

[TszKitLo40]

What type of PR is this：

• [ ] bug
• [ ] feature
• [ ] enhancement
• [x] refactor
• [ ] others

Which issues of this PR fixes ：

Fixes #

Problem Summary(Required) ：

Change the field type of service id to String

Checklist:

• [ ] I have added test cases for my bug fix or my new feature
• [ ] I have added user document for my new feature or new function

[kevincai]

Looks like test case should be changed or improved to reflect serviceId type change.

[TszKitLo40]

Looks like test case should be changed or improved to reflect serviceId type change.

I have changed the test case.

[sonarqubecloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

0.0% Coverage
0.0% Duplication

[wanpengfei-git]

[FE PR Coverage Check]

:heart_eyes: pass : 4 / 5 (80.00%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
:large_blue_circle:	com/starrocks/lake/StarOSAgent.java	4	5	80.00%	[172]

[wanpengfei-git]

run starrocks_admit_test

[TszKitLo40]

run starrocks_admit_test