parser: support REORGANIZE PARTITION syntax

[spongedu]

What problem does this PR solve?

for #419 , support REORGANIZE PARTITION syntax

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)

Code changes

N / A

Side effects

N / A

Related changes

N / A

[codecov]

Codecov Report

Merging #494 into master will increase coverage by 0.04%.
The diff coverage is 90.47%.

@@            Coverage Diff             @@
##           master     #494      +/-   ##
==========================================
+ Coverage   71.49%   71.53%   +0.04%     
==========================================
  Files          32       32              
  Lines        7675     7693      +18     
==========================================
+ Hits         5487     5503      +16     
- Misses       1667     1668       +1     
- Partials      521      522       +1

Impacted Files	Coverage Δ
parser.go	70.58% <ø> (ø)	⬆️
misc.go	96.42% <ø> (ø)	⬆️
ast/ddl.go	80.05% <90.47%> (+0.1%)	⬆️
ast/misc.go	74.05% <0%> (ø)	⬆️

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[zier-one]

LGTM

[zier-one]

@tangenta PTAL

[tangenta]

LGTM