fix: [GoSDK] reset cache after `UsingDatabase`

[congqixia]

Related to milvus-io/milvus-sdk-go#809

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: congqixia

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 81.33%. Comparing base (56b3490) to head (127077a). Report is 20 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #35638      +/-   ##
==========================================
+ Coverage   81.32%   81.33%   +0.01%     
==========================================
  Files        1238     1238              
  Lines      148082   148082              
==========================================
+ Hits       120425   120444      +19     
+ Misses      22887    22874      -13     
+ Partials     4770     4764       -6     

see 22 files with indirect coverage changes

[mergify[bot]]

@congqixia E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[congqixia]

/run-cpu-e2e

[mergify[bot]]

@congqixia E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[ThreadDao]

/lgtm