Add PgIdType based schema generation for PgVectorStore

[CChuYong]

This pull request includes id-type based schema generation support in PgVectorStore.

• Added id type based schema generation
  • currently schema initialization only supports UUID Type.
  • even if I specify a type other than uuid, the type of the table's id column becomes uuid.
  • so i added type based ddl execution when initializeSchema properties set to true
  • also only create uuid extension when id type set to UUID.
• Added test for each types.

[ilayaperumalg]

@CChuYong Thanks for your PR adding this feature. Rebased and merged as c02430e