fix: add router when build request context for mysql

[jiacai2050]

Which issue does this PR close?

Closes #

Rationale for this change

After #803, mysql protocol is broken

2023-04-06 15:04:39.811 ERRO [server/src/mysql/worker.rs:99] MysqlWorker on_query failed. err:Failed to create request context, err:Missing router.   
Backtrace:                                                                                                                                            
 0 backtrace::backtrace::libunwind::trace::h02fd638a62f821d3                                                                                          
   /Users/jiacai/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.67/src/backtrace/libunwind.rs:93                                       
   backtrace::backtrace::trace_unsynchronized::h21f1d53b167bd280                                                                                      
   /Users/jiacai/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.67/src/backtrace/mod.rs:66                                             
 1 backtrace::backtrace::trace::h5f4a55b0f18253c1                                                                                                     
   /Users/jiacai/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.67/src/backtrace/mod.rs:53                                             
 2 backtrace::capture::Backtrace::create::h5df2d1bf7de6d59d                                                                                           
   /Users/jiacai/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.67/src/capture.rs:176                                                  
 3 backtrace::capture::Backtrace::new::h6666dcbb050e34a2 

What changes are included in this PR?

• Add router when build request context for mysql

Are there any user-facing changes?

No

How does this change test

Add new integration tests for mysql

[codecov-commenter]

Codecov Report

Merging #809 (d0efc20) into main (f5af256) will decrease coverage by 0.02%.
The diff coverage is 0.00%.

❗ Current head d0efc20 differs from pull request most recent head e717bb7. Consider uploading reports for the commit e717bb7 to get more accurate results

@@            Coverage Diff             @@
##             main     #809      +/-   ##
==========================================
- Coverage   67.86%   67.84%   -0.02%     
==========================================
  Files         295      295              
  Lines       46631    46646      +15     
==========================================
+ Hits        31648    31649       +1     
- Misses      14983    14997      +14     

Impacted Files	Coverage Δ
server/src/mysql/builder.rs	0.00% <0.00%> (ø)
server/src/mysql/error.rs	0.00% <ø> (ø)
server/src/mysql/service.rs	0.00% <0.00%> (ø)
server/src/mysql/worker.rs	0.00% <0.00%> (ø)
server/src/server.rs	0.00% <0.00%> (ø)

... and 5 files with indirect coverage changes

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

[Rachelint]

LGTM