bugfix: After 1.6.0, auto-increment of pgsql pk columns are no longer supported

[isharpever]

• I have registered the PR changes.

Ⅰ. Describe what this PR did

fix：1.6.0~1.6.1，AT模式，当insert语句不包含主键列时，无法获取到pgsql的自增主键值。

Ⅱ. Does this pull request fix one issue?

fixes #5264

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

添加下面几个单测
io.seata.rm.datasource.exec.PostgresqlInsertExecutorTest#testGetPkValues_SinglePk
io.seata.rm.datasource.exec.PostgresqlInsertExecutorTest#testGetPkValues_MultiPk
io.seata.rm.datasource.exec.PostgresqlInsertExecutorTest#testContainsAnyPK

Ⅳ. Describe how to verify it

集成测试验证了下面几种情况

    /*
     * 单主键场景
     * 表: single
     * 列: id, name
     * 主键: id
     */
    // insert columns为空：从插入行获取主键值
    jdbcTemplate.update("insert into single values(1, ?)", name);

    // insert columns包含主键：从插入行获取主键值
    jdbcTemplate.update("insert into single(id, name) values(2, ?)", name);

    // insert columns不是空, 且不包含主键：获取自增值
    jdbcTemplate.update("insert into single(name) values(?)", name);

    /*
     * 多主键场景
     * 表: multi
     * 列: id1, id2, name
     * 联合主键: (id1, id2)
     */
    // insert columns为空：从插入行获取全部主键值
    jdbcTemplate.update("insert into multi values(1, 1, ?)", name);

    // insert columns包含全部主键：从插入行获取全部主键值
    jdbcTemplate.update("insert into multi(id1, id2, name) values(2, 2, ?)", name);

    // insert columns包含部分主键：从插入行获取存在的主键值，其他获取自增值
    jdbcTemplate.update("insert into multi(id1, name) values(3, ?)", name);
    jdbcTemplate.update("insert into multi(id2, name) values(4, ?)", name);

    // insert columns不是空, 且不包含主键：全部主键都获取自增值
    jdbcTemplate.update("insert into multi(name) values(?)", name);

Ⅴ. Special notes for reviews

[codecov-commenter]

Codecov Report

Merging #5287 (8e03b4f) into develop (cee99cd) will increase coverage by 0.01%.
The diff coverage is 94.73%.

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@@              Coverage Diff              @@
##             develop    #5287      +/-   ##
=============================================
+ Coverage      48.73%   48.74%   +0.01%     
- Complexity      4159     4169      +10     
=============================================
  Files            743      743              
  Lines          26590    26608      +18     
  Branches        3321     3327       +6     
=============================================
+ Hits           12958    12970      +12     
- Misses         12232    12238       +6     
  Partials        1400     1400              

Impacted Files	Coverage Δ
...urce/exec/postgresql/PostgresqlInsertExecutor.java	67.92% <94.73%> (+16.49%)	⬆️
...er/src/main/java/io/seata/server/ServerRunner.java	50.00% <0.00%> (-15.39%)	⬇️
...torage/file/store/FileTransactionStoreManager.java	58.52% <0.00%> (-1.29%)	⬇️
...o/seata/server/coordinator/DefaultCoordinator.java	46.61% <0.00%> (+0.39%)	⬆️
...o/seata/rm/datasource/exec/BaseInsertExecutor.java	62.38% <0.00%> (+0.45%)	⬆️

[funky-eyes]

LGTM

[l81893521]

LGTM