TENANT-4054: Add tenant empty check

[BohuTANG]

I hereby agree to the terms of the CLA available at: https://databend.rs/dev/policies/cla/

Summary

Summary about this PR：

1. Add tenant empty check to KVApi and MetaApi, make sure the tenant not empty to metasrv
2. Make the tests more simple

Changelog

• Improvement

Related Issues

Fixes #4054

Test Plan

Unit Tests

Stateless Tests

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[codecov-commenter]

Codecov Report

Merging #4057 (2650e4f) into main (c340c45) will increase coverage by 0%.
The diff coverage is 82%.

@@          Coverage Diff          @@
##            main   #4057   +/-   ##
=====================================
  Coverage     57%     57%           
=====================================
  Files        825     825           
  Lines      43625   43657   +32     
=====================================
+ Hits       24935   24979   +44     
+ Misses     18690   18678   -12     

Impacted Files	Coverage Δ
query/src/users/role_mgr.rs	85% <ø> (ø)
query/src/users/user_setting.rs	0% <ø> (ø)
common/management/src/role/role_mgr.rs	77% <60%> (-1%)	⬇️
common/management/src/setting/setting_mgr.rs	94% <60%> (-2%)	⬇️
common/management/src/stage/stage_mgr.rs	92% <60%> (-2%)	⬇️
common/management/src/udf/udf_mgr.rs	87% <60%> (-1%)	⬇️
common/management/src/user/user_mgr.rs	94% <60%> (-1%)	⬇️
common/management/src/cluster/cluster_mgr.rs	77% <75%> (-3%)	⬇️
query/src/catalogs/impls/database_catalog.rs	78% <86%> (+1%)	⬆️
query/src/clusters/cluster.rs	40% <100%> (ø)
... and 13 more

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[drmingdrmer]

LGTM:DDD

[drmingdrmer]

/lgtm

[databend-bot]

Wait for another reviewer approval

[databend-bot]

CI Passed
Reviewers Approved
Let's Merge
Thank you for the PR @BohuTANG