Native MySQL dumper

[liweiyi88]

Add the native mysql dumper to enable mysql users to use onedump without mysqldump dependency

[codecov]

Codecov Report

Attention: Patch coverage is 73.73358% with 140 lines in your changes missing coverage. Please review.

Project coverage is 77.79%. Comparing base (33f30a5) to head (5d7c4a0).

Files	Patch %	Lines
dumper/mysqlnativedump.go	73.35%	76 Missing and 13 partials ⚠️
dumper/pgdump.go	48.83%	22 Missing ⚠️
dumper/mysqldump.go	67.56%	10 Missing and 2 partials ⚠️
dumper/runner/ssh.go	60.00%	8 Missing and 4 partials ⚠️
testutils/ssh.go	76.92%	2 Missing and 1 partial ⚠️
handler/jobhandler.go	66.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #31      +/-   ##
==========================================
- Coverage   78.98%   77.79%   -1.20%     
==========================================
  Files          20       23       +3     
  Lines         947     1333     +386     
==========================================
+ Hits          748     1037     +289     
- Misses        136      227      +91     
- Partials       63       69       +6     

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