Enhancement: Optimize Pax table insertion performance

[gongxun0928]

1. Explicit inline functions.
2. Instead of checking the physical size of the file every time a tuple is inserted, it is checked every 16 tuples.

performance result

create table t1(a int, b int, c int, d int, e text, f text,g text, h text) using pax with(compresstype
=zstd,compresslevel=5);

gpadmin=# insert into t1 select i, i+1,i+2,i+3, i::text, i::text, i::text, i::text from generate_series(1,5000000) i;
INSERT 0 5000000
Time: 6124.535 ms (00:06.125)
gpadmin=# insert into t1 select i, i+1,i+2,i+3, i::text, i::text, i::text, i::text from generate_series(1,5000000) i;
INSERT 0 5000000
Time: 5993.682 ms (00:05.994)

-- optimized with this commit
create table t1(a int, b int, c int, d int, e text, f text,g text, h text) using pax with(compresstype
=zstd,compresslevel=5);
gpadmin=# insert into t1 select i, i+1,i+2,i+3, i::text, i::text, i::text, i::text from generate_series(1,5000000) i;
INSERT 0 5000000
Time: 5713.184 ms (00:05.713)
gpadmin=# insert into t1 select i, i+1,i+2,i+3, i::text, i::text, i::text, i::text from generate_series(1,5000000) i;
INSERT 0 5000000
Time: 5430.221 ms (00:05.430)

Fixes #ISSUE_Number

What does this PR do?

Type of Change

• Bug fix (non-breaking change)
• New feature (non-breaking change)
• Breaking change (fix or feature with breaking changes)
• Documentation update

Breaking Changes

Test Plan

• Unit tests added/updated
• Integration tests added/updated
• Passed make installcheck
• Passed make -C src/test installcheck-cbdb-parallel

Impact

Performance:

User-facing changes:

Dependencies:

Checklist

• Followed contribution guide
• Added/updated documentation
• Reviewed code for security implications
• Requested review from cloudberry committers

Additional Context

CI Skip Instructions

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[jiaqizho]

LGTM with single comment