Fix the smallserial issue not being parsed as a SmallInt type for Postgres

[MalloD12]

Impact

• Bug fix (non-breaking change which fixes expected existing functionality)
• Enhancement/New feature (adds functionality without impacting existing logic)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

"smallserial" alias has been added as part of the "SmallInt" type to allow liquibase to generate the expected SQL statements form a given changelog.

Fixes #1946

Things to be aware of

• Code changes are what I'd expect for postgres handling serial types

Things to worry about

• Nothing

Additional Context

• Nothing

[github-actions]

Unit Test Results

  4 620 files  ±0    4 620 suites  ±0   33m 52s ⏱️ - 3m 23s
  4 619 tests ±0    4 400 ✔️  - 4     219 💤 +4  0 ❌ ±0 
54 600 runs  ±0  49 576 ✔️  - 4  5 024 💤 +4  0 ❌ ±0 

Results for commit d65c825. ± Comparison against base commit 98e7a36.

[nvoxland]

Code review and test results:

Things to be aware of:

• The changes all look good, nice job
• Only impacts smallserial handling on postgresql

Things to worry about:

• Nothing

[XDelphiGrl]

Fix addresses bug where the Postgres smallint data type was mishandled during SQL generation. The fix adds a smallint alias for smallserial and sets autoincrement to true for smallserial.

• New unit test added.
• No additional testing required.

APPROVED