enhance: Enable dynamic update loaded collection's replica

[weiliu1031]

issue: #35821
pr: #35822
After collection loaded, if we need to increase/decrease collection's replica, we need to release and load it again.

milvus offers 4 solution to update loaded collection's replica, this PR aims to dynamic change the replica number without release, and after replica number changed, milvus will execute load replica or release replica in async, and the replica loaded status can be checked by getReplicas API.

Notice that if set too much replicas than querynode can afford，the new replica won't be loaded successfully until enough querynode joins.

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[mergify]

@weiliu1031 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[weiliu1031]

rerun ut

[weiliu1031]

/run-cpu-e2e

[codecov]

Codecov Report

Attention: Patch coverage is 79.30233% with 89 lines in your changes missing coverage. Please review.

Project coverage is 71.90%. Comparing base (7ac3ef9) to head (327925d).

Files with missing lines	Patch %	Lines
internal/querycoordv2/job/job_update.go	54.79%	25 Missing and 8 partials ⚠️
internal/querycoordv2/server.go	72.09%	8 Missing and 4 partials ⚠️
internal/querycoordv2/services.go	88.42%	8 Missing and 3 partials ⚠️
internal/querycoordv2/meta/resource_manager.go	0.00%	9 Missing ⚠️
internal/rootcoord/alter_database_task.go	73.33%	5 Missing and 3 partials ⚠️
internal/querycoordv2/job/job_load.go	72.22%	4 Missing and 1 partial ⚠️
internal/querycoordv2/meta/replica_manager.go	85.71%	2 Missing and 2 partials ⚠️
internal/rootcoord/alter_collection_task.go	88.88%	2 Missing and 1 partial ⚠️
internal/querycoordv2/meta/collection_manager.go	86.66%	1 Missing and 1 partial ⚠️
internal/util/mock/grpc_querycoord_client.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              2.4   #36417      +/-   ##
==========================================
+ Coverage   71.88%   71.90%   +0.02%     
==========================================
  Files        1060     1061       +1     
  Lines      139734   140086     +352     
==========================================
+ Hits       100452   100735     +283     
- Misses      34999    35044      +45     
- Partials     4283     4307      +24     

Files with missing lines	Coverage Δ
internal/distributed/querycoord/client/client.go	97.53% <100.00%> (+0.06%)	⬆️
internal/distributed/querycoord/service.go	77.92% <100.00%> (+0.19%)	⬆️
internal/metastore/catalog.go	100.00% <ø> (ø)
internal/metastore/kv/querycoord/kv_catalog.go	76.37% <100.00%> (+0.26%)	⬆️
internal/querycoordv2/checkers/channel_checker.go	86.98% <100.00%> (+1.56%)	⬆️
internal/querycoordv2/checkers/segment_checker.go	89.73% <100.00%> (+0.07%)	⬆️
internal/querycoordv2/utils/meta.go	73.10% <100.00%> (+10.28%)	⬆️
pkg/config/etcd_source.go	85.71% <100.00%> (ø)
tests/integration/minicluster_v2.go	74.07% <100.00%> (+0.26%)	⬆️
internal/querycoordv2/meta/collection_manager.go	88.52% <86.66%> (-0.08%)	⬇️
... and 9 more

... and 33 files with indirect coverage changes