Slow Docker-based integration tests due to emulation

This issue is to find the best way to test DB2 and SQLServer job repository support without impacting the build performance due to the following warnings:

[INFO] Running org.springframework.batch.core.test.repository.Db2JobRepositoryIntegrationTests
[main] INFO tc.icr.io/db2_community/db2:11.5.9.0 - Creating container for image: icr.io/db2_community/db2:11.5.9.0
[main] INFO org.testcontainers.utility.RegistryAuthLocator - Credential helper/store (docker-credential-desktop) does not have credentials for icr.io
[main] INFO tc.icr.io/db2_community/db2:11.5.9.0 - Container icr.io/db2_community/db2:11.5.9.0 is starting: c1ec17e0e6a8a3c1f14086528b766bd3bbd2695e3ed3fb36e9ad8168437c7739
[main] WARN tc.icr.io/db2_community/db2:11.5.9.0 - The architecture 'amd64' for image 'icr.io/db2_community/db2:11.5.9.0' (ID sha256:dee45baf523a6261bc8837574f37568b0f81c727d36f2076cd89d94b31deda8e) does not match the Docker server architecture 'arm64'. This will cause the container to execute much more slowly due to emulation and may lead to timeout failures.

And

[INFO] Running org.springframework.batch.core.test.repository.SQLServerJobRepositoryIntegrationTests
[main] INFO tc.mcr.microsoft.com/mssql/server:2022-CU14-ubuntu-22.04 - Creating container for image: mcr.microsoft.com/mssql/server:2022-CU14-ubuntu-22.04
[main] INFO org.testcontainers.utility.RegistryAuthLocator - Credential helper/store (docker-credential-desktop) does not have credentials for mcr.microsoft.com
[main] INFO tc.mcr.microsoft.com/mssql/server:2022-CU14-ubuntu-22.04 - Container mcr.microsoft.com/mssql/server:2022-CU14-ubuntu-22.04 is starting: 230927f77d014b29fc444395c10f347f77a2d66b36893307d5e3c0617a34c206
[main] WARN tc.mcr.microsoft.com/mssql/server:2022-CU14-ubuntu-22.04 - The architecture 'amd64' for image 'mcr.microsoft.com/mssql/server:2022-CU14-ubuntu-22.04' (ID sha256:004f8fbb046cd906f39ce3042e0ade32760907acc60a5acc8bfe2c3623c72937) does not match the Docker server architecture 'arm64'. This will cause the container to execute much more slowly due to emulation and may lead to timeout failures.
[main] INFO tc.mcr.microsoft.com/mssql/server:2022-CU14-ubuntu-22.04 - Waiting for database connection to become available at jdbc:sqlserver://localhost:49181 using query 'SELECT 1'

Start with Db2JobRepositoryIntegrationTests and SQLServerJobRepositoryIntegrationTests, then inspect how their Docker-based database containers are configured and where the amd64-versus-arm64 warnings occur. Done means finding a way to test DB2 and SQLServer job repository support without materially slowing the build through emulation or causing timeout failures.