refactor(query): add setting external_server_request_retry_times

[sundy-li]

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Summary

1. add setting external_server_request_retry_times and profile the retry counts
2. fix index_uncheck in nullable type

🐳 :) explain analyze select gcd_error(1,100) from numbers(3);
-[ EXPLAIN ]-----------------------------------
Udf
├── output columns: [gcd_error(1, 100)_arg_0 (#2), gcd_error(1, 100)_arg_1 (#3), gcd_error(1, 100) (#1)]
├── estimated rows: 3.00
├── cpu time: 6.427012ms
├── wait time: 2.031678683s
├── output rows: 3
├── output bytes: 21.00 B
├── external server retry count: 4
├── udf functions: gcd_error(gcd_error(1, 100)_arg_0 (#2), gcd_error(1, 100)_arg_1 (#3))
└── EvalScalar
    ├── output columns: [gcd_error(1, 100)_arg_0 (#2), gcd_error(1, 100)_arg_1 (#3)]
    ├── expressions: [1, 100]
    ├── estimated rows: 3.00
    ├── cpu time: 44.442µs
    ├── output rows: 3
    ├── output bytes: 8.00 B
    └── TableScan
        ├── table: default.system.numbers
        ├── output columns: []
        ├── read rows: 3
        ├── read size: < 1 KiB
        ├── partitions total: 1
        ├── partitions scanned: 1
        ├── push downs: [filters: [], limit: NONE]
        ├── estimated rows: 3.00
        ├── cpu time: 87.946µs
        ├── output rows: 3
        └── bytes scanned: 24.00 B

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

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