[Enhancement](multi-catalog) merge hms partition events.

[dutyu]

Proposed changes

Issue Number: close #xxx

This pr mainly has two changes:

1. add some merge processes about partition events
2. add a ut for MetastoreEventFactory. First add some mock classes (MockCatalog/MockDatabase ...) to simulate the real hms catalog/databases/tables/partitions, then create a event producer which can produce every kinds of MetastoreEvents randomly. Use two catalogs for test, one is named testCatalog and the other is the validateCatalog, use event producer to produce many events and let validateCatalog to handle all of the events, but testCatalog just handles the events which have been merged by MetastoreEventFactory, check if the validateCatalog is equals to testCatalog.

Further comments

If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...

[dutyu]

run buildall

[hello-stephen]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 45.64 seconds
stream load tsv: 518 seconds loaded 74807831229 Bytes, about 137 MB/s
stream load json: 20 seconds loaded 2358488459 Bytes, about 112 MB/s
stream load orc: 65 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 32 seconds loaded 861443392 Bytes, about 25 MB/s
insert into select: 29.3 seconds inserted 10000000 Rows, about 341K ops/s
storage size: 17162489722 Bytes

[dutyu]

run buildall

[hello-stephen]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 45.81 seconds
stream load tsv: 514 seconds loaded 74807831229 Bytes, about 138 MB/s
stream load json: 20 seconds loaded 2358488459 Bytes, about 112 MB/s
stream load orc: 65 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 31 seconds loaded 861443392 Bytes, about 26 MB/s
insert into select: 28.9 seconds inserted 10000000 Rows, about 346K ops/s
storage size: 17162419752 Bytes

[zddr]

Add some comments on the canBeBatched

[dutyu]

run buildall

[dutyu]

Add some comments on the canBeBatched

Got it , i've add some comments at canBeBatched.

[hello-stephen]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 45.34 seconds
stream load tsv: 555 seconds loaded 74807831229 Bytes, about 128 MB/s
stream load json: 20 seconds loaded 2358488459 Bytes, about 112 MB/s
stream load orc: 65 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 31 seconds loaded 861443392 Bytes, about 26 MB/s
insert into select: 29.2 seconds inserted 10000000 Rows, about 342K ops/s
storage size: 17162102911 Bytes

[dutyu]

run buildall

[hello-stephen]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 45.76 seconds
stream load tsv: 541 seconds loaded 74807831229 Bytes, about 131 MB/s
stream load json: 21 seconds loaded 2358488459 Bytes, about 107 MB/s
stream load orc: 66 seconds loaded 1101869774 Bytes, about 15 MB/s
stream load parquet: 32 seconds loaded 861443392 Bytes, about 25 MB/s
insert into select: 29.1 seconds inserted 10000000 Rows, about 343K ops/s
storage size: 17162435496 Bytes

[zddr]

LGTM

[github-actions]

PR approved by anyone and no changes requested.

[dataroaring]

run buildall

[hello-stephen]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 49.42 seconds
stream load tsv: 529 seconds loaded 74807831229 Bytes, about 134 MB/s
stream load json: 20 seconds loaded 2358488459 Bytes, about 112 MB/s
stream load orc: 64 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 30 seconds loaded 861443392 Bytes, about 27 MB/s
insert into select: 29.2 seconds inserted 10000000 Rows, about 342K ops/s
storage size: 17162097605 Bytes

[morningman]

run buildall

[morningman]

LGTM

[github-actions]

PR approved by at least one committer and no changes requested.

[doris-robot]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 47.64 seconds
stream load tsv: 536 seconds loaded 74807831229 Bytes, about 133 MB/s
stream load json: 21 seconds loaded 2358488459 Bytes, about 107 MB/s
stream load orc: 64 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 31 seconds loaded 861443392 Bytes, about 26 MB/s
insert into select: 29.0 seconds inserted 10000000 Rows, about 344K ops/s
storage size: 17162376200 Bytes