[Refactor] Refactor cross-cluster replication limits

[xiangguangyxg]

Why I'm doing:

Some limits of cross-cluster replication are inappropriate.

What I'm doing:

Add config replication_max_parallel_replica_count with default value 10240. Change the default value of replication_max_parallel_data_size_mb from 10G to 1T. Change the default value of replication_threads from number of cpu cores to 4 times of number of cpu cores.

Fixes #issue

What type of PR is this:

• [ ] BugFix
• [ ] Feature
• [ ] Enhancement
• [x] Refactor
• [ ] UT
• [ ] Doc
• [ ] Tool

Does this PR entail a change in behavior?

• [ ] Yes, this PR will result in a change in behavior.
• [x] No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

• [ ] Interface/UI changes: syntax, type conversion, expression evaluation, display information
• [ ] Parameter changes: default values, similar parameters but with different default values
• [ ] Policy changes: use new policy to replace old one, functionality automatically enabled
• [ ] Feature removed
• [ ] Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

• [ ] I have added test cases for my bug fix or my new feature
• [x] This pr needs user documentation (for new or modified features or behaviors)
  • [x] I have added documentation for my new feature or new function
• [ ] This is a backport pr

Bugfix cherry-pick branch check:

• [x] I have checked the version labels which the pr will be auto-backported to the target branch
  • [x] 3.3
  • [x] 3.2
  • [x] 3.1
  • [ ] 3.0
  • [ ] 2.5

[sonarqubecloud[bot]]

Quality Gate failed

Failed conditions
9.1% Duplication on New Code (required ≤ 3%)

See analysis details on SonarCloud

[github-actions[bot]]

[FE Incremental Coverage Report]

:white_check_mark: pass : 41 / 46 (89.13%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
:large_blue_circle:	com/starrocks/replication/ReplicationMgr.java	5	8	62.50%	[95, 193, 194]
:large_blue_circle:	com/starrocks/replication/ReplicationJob.java	33	35	94.29%	[114, 399]
:large_blue_circle:	com/starrocks/common/Config.java	3	3	100.00%	[]

[github-actions[bot]]

[BE Incremental Coverage Report]

:x: fail : 4 / 7 (57.14%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
:large_blue_circle:	be/src/agent/agent_server.cpp	4	7	57.14%	[74, 77, 590]

[xiangguangyxg]

@Mergify backport branch-3.3 branch-3.2 branch-3.1

[mergify[bot]]

backport branch-3.3 branch-3.2 branch-3.1

✅ Backports have been created

• #45572 [Refactor] Refactor cross-cluster replication limits (backport #45473) has been created for branch branch-3.3
• #45573 [Refactor] Refactor cross-cluster replication limits (backport #45473) has been created for branch branch-3.2
• #45574 [Refactor] Refactor cross-cluster replication limits (backport #45473) has been created for branch branch-3.1