support database without read-only transaction

[davies]

Vitess is a MySQL proxy, which does not support read-only transactions, we will fallback to default transactions.

close #2237

[codecov-commenter]

Codecov Report

Merging #2259 (5dba143) into main (32fbe0d) will increase coverage by 0.13%.
The diff coverage is 71.42%.

@@            Coverage Diff             @@
##             main    #2259      +/-   ##
==========================================
+ Coverage   61.74%   61.88%   +0.13%     
==========================================
  Files         138      137       -1     
  Lines       25052    25192     +140     
==========================================
+ Hits        15468    15589     +121     
- Misses       7784     7794      +10     
- Partials     1800     1809       +9     

Impacted Files	Coverage Δ
pkg/meta/sql.go	65.85% <52.38%> (-0.33%)	⬇️
cmd/config.go	67.81% <100.00%> (-0.19%)	⬇️
cmd/format.go	60.18% <100.00%> (-0.13%)	⬇️
cmd/objbench.go	62.70% <100.00%> (ø)
pkg/meta/base.go	71.44% <100.00%> (+1.41%)	⬆️
pkg/meta/config.go	55.14% <100.00%> (+1.74%)	⬆️
pkg/meta/redis.go	71.64% <100.00%> (+0.04%)	⬆️
pkg/meta/tkv.go	76.12% <100.00%> (ø)
pkg/metric/metrics.go	22.72% <0.00%> (-9.28%)	⬇️
pkg/vfs/reader.go	77.18% <0.00%> (-3.11%)	⬇️
... and 15 more

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