Implement OctInt/OctString function push down

[Ziy1-Tan]

What problem does this PR solve?

Implement OctInt/OctString function push down

Issue Number: close #5110
Related PR: pingcap/tidb#38316

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

None

[ti-chi-bot]

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[Ziy1-Tan]

/run-all-tests

[sre-bot]

Coverage for changed files

Filename                                        Regions    Missed Regions     Cover   Functions  Missed Functions  Executed       Lines      Missed Lines     Cover    Branches   Missed Branches     Cover
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Flash/Coprocessor/DAGUtils.cpp                      347               124    64.27%          45                 6    86.67%         638               240    62.38%         412               158    61.65%
Functions/FunctionsString.cpp                      1613               393    75.64%         307                75    75.57%        3474               828    76.17%        1000               321    67.90%
Functions/tests/gtest_strings_octint.cpp             36                14    61.11%           2                 0   100.00%         109                 0   100.00%           8                 8     0.00%
Functions/tests/gtest_strings_octstring.cpp          24                14    41.67%           2                 0   100.00%          47                 0   100.00%           8                 8     0.00%
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
TOTAL                                              2020               545    73.02%         356                81    77.25%        4268              1068    74.98%        1428               495    65.34%

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
18407      7484             59.34%    215658  77113        64.24%

full coverage report (for internal network access only)

[Ziy1-Tan]

/cc @SeaRise

[Ziy1-Tan]

/run-all-tests

[sre-bot]

Coverage for changed files

Filename                                        Regions    Missed Regions     Cover   Functions  Missed Functions  Executed       Lines      Missed Lines     Cover    Branches   Missed Branches     Cover
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Flash/Coprocessor/DAGUtils.cpp                      347               124    64.27%          45                 6    86.67%         638               240    62.38%         412               158    61.65%
Functions/FunctionsString.cpp                      1616               392    75.74%         307                75    75.57%        3478               826    76.25%        1002               320    68.06%
Functions/tests/gtest_strings_octint.cpp             53                14    73.58%           3                 0   100.00%         152                 0   100.00%           8                 8     0.00%
Functions/tests/gtest_strings_octstring.cpp          27                14    48.15%           3                 0   100.00%          67                 0   100.00%           8                 8     0.00%
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
TOTAL                                              2043               544    73.37%         358                81    77.37%        4335              1066    75.41%        1430               494    65.45%

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
18413      7446             59.56%    215867  76508        64.56%

full coverage report (for internal network access only)

[Ziy1-Tan]

/run-all-tests

[ti-chi-bot]

@Ziy1-Tan: PR needs rebase.

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