[WIP][enhancement] support to analyze external table

[dirtysalt]

What type of PR is this：

• [ ] bug
• [ ] feature
• [x] enhancement
• [ ] refactor
• [ ] others

Which issues of this PR fixes ：

Fixes #

Problem Summary(Required) ：

Checklist:

• [ ] I have added test cases for my bug fix or my new feature
• [ ] I have added user document for my new feature or new function

[wanpengfei-git]

[FE PR Coverage Check]

:disappointed: fail : 16 / 37 (43.24%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
:large_blue_circle:	com/starrocks/catalog/Table.java	0	3	00.00%	[349, 353, 357]
:large_blue_circle:	com/starrocks/sql/optimizer/statistics/Statistics.java	0	1	00.00%	[131]
:large_blue_circle:	com/starrocks/statistic/SampleStatisticsCollectJob.java	0	1	00.00%	[64]
:large_blue_circle:	com/starrocks/sql/optimizer/statistics/StatisticsCalculator.java	0	6	00.00%	[332, 336, 337, 339, 340, 342]
:large_blue_circle:	com/starrocks/statistic/StatisticExecutor.java	0	2	00.00%	[178, 179]
:large_blue_circle:	com/starrocks/sql/analyzer/AnalyzeStmtAnalyzer.java	0	2	00.00%	[124, 125]
:large_blue_circle:	com/starrocks/qe/StmtExecutor.java	2	7	28.57%	[220, 221, 808, 819, 824]
:large_blue_circle:	com/starrocks/statistic/StatisticsCollectJobFactory.java	8	9	88.89%	[134]
:large_blue_circle:	com/starrocks/catalog/OlapTable.java	2	2	100.00%	[]
:large_blue_circle:	com/starrocks/statistic/StatisticUtils.java	3	3	100.00%	[]
:large_blue_circle:	com/starrocks/statistic/StatisticsCollectJob.java	1	1	100.00%	[]

[sonarqubecloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
2 Code Smells

0.0% Coverage
0.0% Duplication

[wanpengfei-git]

run starrocks_admit_test

[dirtysalt]

run starrocks_admit_test