optimize: optimize get table meta in postgre sql

[l81893521]

Ⅰ. Describe what this PR did

optimize get table meta in postgre sql

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-commenter]

Codecov Report

Merging #2723 into develop will decrease coverage by 0.01%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             develop    #2723      +/-   ##
=============================================
- Coverage      50.89%   50.88%   -0.02%     
+ Complexity      2849     2848       -1     
=============================================
  Files            567      567              
  Lines          18173    18172       -1     
  Branches        2166     2166              
=============================================
- Hits            9250     9247       -3     
  Misses          8029     8029              
- Partials         894      896       +2     

Impacted Files	Coverage Δ	Complexity Δ
...rce/sql/struct/cache/PostgresqlTableMetaCache.java	76.13% <ø> (-0.27%)	10.00 <0.00> (ø)
...o/seata/server/coordinator/DefaultCoordinator.java	54.63% <0.00%> (-0.52%)	29.00% <0.00%> (ø%)
...in/java/io/seata/server/session/GlobalSession.java	83.71% <0.00%> (-0.46%)	71.00% <0.00%> (-1.00%)

[slievrly]

LGTM

[jsbxyyx]

LGTM