Support JSON datatype

[congqixia]

See also #432
Related to milvus-io/milvus#23389
/kind enhancement

[sre-ci-robot]

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[codecov]

Codecov Report

Merging #461 (0cff0a4) into v2.2.x (8b02b8e) will increase coverage by 0.05%.
The diff coverage is 91.17%.

@@            Coverage Diff             @@
##           v2.2.x     #461      +/-   ##
==========================================
+ Coverage   86.69%   86.74%   +0.05%     
==========================================
  Files          33       34       +1     
  Lines        2932     2966      +34     
==========================================
+ Hits         2542     2573      +31     
- Misses        300      303       +3     
  Partials       90       90              

Impacted Files	Coverage Δ
client/admin.go	83.33% <ø> (ø)
client/alias.go	100.00% <ø> (ø)
client/authentication.go	100.00% <ø> (ø)
client/collection.go	85.40% <ø> (ø)
client/data.go	72.72% <ø> (ø)
client/database.go	92.85% <ø> (ø)
client/index.go	77.95% <ø> (ø)
client/maintainance.go	95.55% <ø> (ø)
client/options.go	79.16% <ø> (ø)
client/partition.go	82.67% <ø> (ø)
... and 5 more

[yah01]

/lgtm