[Backport 2.x] Check before delete

[xinyual]

Manually backport to resolve dco problem for #3430
Backport 570edaf from #3209

• add logic to detect agent before deleting

• add logic to detect agent before deleting

• add logic to detect pipelines before delete model

• check pipeline before deleting

• apply spotless

• remove useless file

• rename functions

• fix failure test

• add UT

• apply spotless

• renam

• refactor to parallel check

• concate error message

• move logic after user access check

• change agent model searcher map to set

• rename and remove useless method

• fix bug to fetch all pipelines

• apply spotless

• apply spotless

• remove and add comment

• rename and add more UTs

• use correct key

• simplify function

• change to a better class

• apply spotless

• change compareAndSet to set

• apply comment

• change name and reformat logic

• change name

• remove useless line

• change to a better method

• change name

• apply spotless

• add java doc for function

• add another interface

• apply java spotless

• change interface to with model

• apply spot less

• add settings

• apply spot less

• add test for cluster setting

• apply spotless

• recover useless change

• change default value of cluster setting

• rename setting and add comment

• apply spot

• remove logic for hidden model

• reorder code

• reorder code

• reorder code

• apply spot

• add UT

• add more UT

• remove search for hidden agent

• fix logic and apply spot

• add exist for UT

• change dsl to query index

• change query logic

• remove useless ut

• rebert

• apply spot

• rechange code

• apply spot

• remove useless should

• apply spot

• fix final dsl logic and ut

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(cherry picked from commit 570edaf)

Description

[Describe what this change achieves]

Related Issues

Resolves #[Issue number to be closed when this PR is merged]

Check List

• New functionality includes testing.
• New functionality has been documented.
• API changes companion pull request created.
• Commits are signed per the DCO using --signoff.
• Public documentation issue/PR created.

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