bugfix: fix business exception is lost when compensation succeed in saga mode

[wangliang181230]

Ⅰ. Describe what this PR did

bug修复：在SAGA事务，以同步方式执行时，正向服务出现异常，补偿方法执行成功后，正向服务的异常未写入，stateMachineInstance中。

现已修复。已可以通过stateMachineInstance.getException()方法获取到该异常了。

此PR从 #2551 中拆分出来的。

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

以同步方式执行SAGA事务，并故意在业务方法中抛出异常，并使冲正补偿执行成功。然后在事务结束后，通过stateMachineInst.getException()，看看是否可以获取到业务方法中抛出的异常信息。

Ⅴ. Special notes for reviews

[wangliang181230]

@long187 ，我从PR #2551 里拆分出来了几个PR，麻烦review一下吧。

[codecov-commenter]

Codecov Report

Merging #2839 into develop will decrease coverage by 0.00%.
The diff coverage is 25.00%.

@@              Coverage Diff              @@
##             develop    #2839      +/-   ##
=============================================
- Coverage      50.03%   50.02%   -0.01%     
+ Complexity      2954     2952       -2     
=============================================
  Files            592      592              
  Lines          18998    18995       -3     
  Branches        2290     2290              
=============================================
- Hits            9506     9503       -3     
+ Misses          8549     8547       -2     
- Partials         943      945       +2     

Impacted Files	Coverage Δ	Complexity Δ
...io/seata/saga/proctrl/impl/ProcessContextImpl.java	26.41% <25.00%> (-0.38%)	9.00 <0.00> (ø)
...o/seata/server/coordinator/DefaultCoordinator.java	54.63% <0.00%> (-0.52%)	28.00% <0.00%> (-1.00%)
...in/java/io/seata/server/session/GlobalSession.java	83.71% <0.00%> (-0.46%)	71.00% <0.00%> (-1.00%)

[long187]

LGTM

[slievrly]

LGTM

[funky-eyes]

LGTM