chore: add export data to migrate tool

[shuiyisong]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

This pr mainly adds export-data to cli export tool.

export

e.g

# export create table
./greptime cli export --addr=127.0.0.1:4001 --output-dir=/tmp/export/ --target=create-table --database="greptime-*"

# export table data
./greptime cli export --addr=127.0.0.1:4001 --output-dir=/tmp/export/ --target=table-data --database="greptime-*"

result

/tmp/export
❯ tree
.
├── greptime-public.sql
├── greptime-thello
│   └── monitor.parquet
├── greptime-thello.sql
└── greptime-thello_copy_from.sql

2 directories, 4 files

import

# create database forehand

# psql
# create tables
psql -h 127.0.0.1 -p 4003 -d thello -a -f greptime-thello.sql
# copy from data
psql -h 127.0.0.1 -p 4003 -d thello -a -f greptime-thello_copy_from.sql

# mysql
mysql -h 127.0.0.1 -P 4002 public < greptime-public.sql

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)

[waynexia]

Rest LGTM

[codecov]

Codecov Report

Merging #2610 (2b139cf) into develop (9056c3a) will decrease coverage by 0.46%.
The diff coverage is 0.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2610      +/-   ##
===========================================
- Coverage    85.23%   84.77%   -0.46%     
===========================================
  Files          738      738              
  Lines       118249   118319      +70     
===========================================
- Hits        100794   100310     -484     
- Misses       17455    18009     +554     

[fengys1996]

LGTM

[evenyag]

suggestion(non-blocking): Can we assign this to a variable first? I took a long time to realize that it is the table name.

let table_name = filename.replace(".parquet", "");

[evenyag]

Can we collect it into a string?

Suggested change

	})
	.collect::<Vec<_>>()
	.join("");
	})
	.collect::<String>();