[Feature] add backends table for information_schema(#45600)

[gohalo]

Why I'm doing:

Currently, we could get some summary info from information_schema database.

But, it's realy poor readable.

What I'm doing:

Add a new table, so we can aggregate, filter with ip, version and so on.

What type of PR is this:

• BugFix
• Feature
• Enhancement
• Refactor
• UT
• Doc
• Tool

Does this PR entail a change in behavior?

• Yes, this PR will result in a change in behavior.
• 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
• This pr needs user documentation (for new or modified features or behaviors)
  • I have added documentation for my new feature or new function
• This is a backport pr

Bugfix cherry-pick branch check:

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

[github-actions]

[FE Incremental Coverage Report]

❌ fail : 0 / 2 (00.00%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
🔵	com/starrocks/catalog/system/information/InfoSchemaDb.java	0	1	00.00%	[91]
🔵	com/starrocks/service/FrontendServiceImpl.java	0	1	00.00%	[290]

[github-actions]

[BE Incremental Coverage Report]

❌ fail : 0 / 4 (00.00%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
🔵	src/exec/schema_scanner/schema_helper.cpp	0	3	00.00%	[190, 191, 192]
🔵	src/exec/schema_scanner.cpp	0	1	00.00%	[217]