feat(inverted_index.create): add external sorter

[zhongzc]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

• Add the Sorter trait for handling sorting of incremental input.
• Add the ExternalSorter implementation, together with the dependency ExternalTempFileProvider to enable access to external files. The ExternalSorter will employ external sorting, has a parameter memory_usage_threshold, and tracks memory usage to ensure that the sorting is completed with a minimal memory footprint.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.

Refer to a related PR or issue link (optional)

#2705

next PR to be proposed:
feat(inverted_index.create): add index creator

[codecov]

Codecov Report

Merging #2950 (bfed3d5) into develop (6b8dbcf) will decrease coverage by 0.50%.
The diff coverage is 98.21%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2950      +/-   ##
===========================================
- Coverage    85.77%   85.27%   -0.50%     
===========================================
  Files          758      762       +4     
  Lines       122730   123123     +393     
===========================================
- Hits        105267   104995     -272     
- Misses       17463    18128     +665     

[killme2008]

LGTM

[killme2008]

@zhongzc There is a clippy warning.

[zhongzc]

There is a clippy warning.

Due to the toolchain update of the develop branch, fixed now.