Upgrade to RMB v35.3.0

RMB 35.3.0 has been released https://github.com/folio-org/raml-module-builder/releases/tag/v35.3.0 .
RMB 35.3.* is the Ramsons (2024 R2) version.
The RMB 35.3.* upgrading notes cover these topics:

• ObjectMapperTool.valueAsString , JsonObject.mapFrom

• TESTCONTAINERS_POSTGRES_IMAGE , postgres:16-alpine , PostgresTesterContainer

• .github/workflows/postgres.yml

• - git submodule update --remote ramls/raml-util/

• lang and totalRecords API parameters