chore: bump testcontainers-modules to 0.14 and remove testcontainers dep

[Jefffrey]

Which issue does this PR close?

• Supersedes chore(deps): bump testcontainers-modules from 0.13.0 to 0.14.0 #19010

Rationale for this change

We don't actually need the dependency on testcontainers per their README:

Note: you don't need to explicitly depend on testcontainers as it's re-exported dependency of testcontainers-modules with aligned version between these crates.

• https://github.com/testcontainers/testcontainers-rs-modules-community/blob/331abcc6e61d9d76e5f8e6ec91566ce874d8fc32/README.md

It was causing some version conflict issues when we tried to bump testcontainers-modules so remove it and keep only modules, fixing the code to use the re-exports.

What changes are included in this PR?

Remove testcontainers dependency, amend imports to use re-exports of testcontainers-modules.

Bump testcontainers-modules from 0.13 to 0.14.

Are these changes tested?

CLI test suite compiles and runs. Ran the SLT postgres compat mode locally successfully:

datafusion (testcontainers-0.14)$ PG_COMPAT=true PG_URI="postgresql://[email protected]/postgres" cargo test --features=postgres --test sqllogictests
    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.19s
     Running bin/sqllogictests.rs (/Users/jeffrey/.cargo_target_cache/debug/deps/sqllogictests-223c346f75c524e2)
Completed 6 test files in 0 seconds 

Are there any user-facing changes?

No.

[comphead]

Thanks @Jefffrey