test: refactor connection method to prioritize uri/token and add query limit

[zhuwenxing]

• Refactor connection logic to prioritize uri and token parameters over host/port/user/password for a more modern connection approach
• Add explicit limit parameter (limit=5) to search and query operations in chaos checkers to avoid returning unlimited results
• Migrate test_all_collections_after_chaos.py from Collection wrapper to MilvusClient API style
• Update pytest fixtures in chaos test files to support uri/token params

[sre-ci-robot]

[ci-v2-notice]
Notice: We are gradually rolling out the new ci-v2 system.

• Legacy CI jobs remain unaffected, you can just ignore ci-v2 if you don't want to run it.
• Additional "ci-v2/*" checkers will run for this PR to ensure the new ci-v2 system is working as expected.
• For tests that exist in both v1 and v2, passing in either system is considered PASS.

To rerun ci-v2 checks, comment with:

• /ci-rerun-code-check // for ci-v2/code-check
• /ci-rerun-build // for ci-v2/build
• /ci-rerun-ut-integration // for ci-v2/ut-integration
• /ci-rerun-ut-go // for ci-v2/ut-go
• /ci-rerun-ut-cpp // for ci-v2/ut-cpp
• /ci-rerun-ut // for all ci-v2/ut-integration, ci-v2/ut-go, ci-v2/ut-cpp
• /ci-rerun-e2e-arm // for ci-v2/e2e-arm [master branch only]
• /ci-rerun-e2e-default // for ci-v2/e2e-default [master branch only]

If you have any questions or requests, please contact @zhikunyao.

[yanliang567]

/lgtm
/approve

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: yanliang567, zhuwenxing

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• tests/OWNERS [yanliang567]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment