Add build script option to install in release mode

[syvb]

Being able to install Toolkit with optimizations enabled is useful for benchmarking purposes. This PR adds an option to build in release mode to the build script.

[epgts]

Can you add $mode to all the other cargo command too? At least those that support it.

Also, what do you think about using -profile [whatever] instead? --release is but a strictly less flexible synonym for --profile release.

Thanks!

[syvb]

Can you add $mode to all the other cargo command too? At least those that support it.

The only other commands are for running tests – turning on optimizations for tests is usually a bad idea (since in release mode some overflow checks are disabled and debug asserts are also removed). It should probably give an error or at least a warning if one tries to run the tests in release mode.

[syvb]

The update test CI failed because the Docker image hasn't been updated with the latest cargo-pgx (which adds --profile to cargo pgx install). I'll push a new Docker image with the changes from #589.

[syvb]

Yep, CI passes now after pushing the updated Docker image.

[syvb]

bors r+

[bors]

Build succeeded:

• Clippy/rustfmt Test
• Test Postgres (12)
• Test Postgres (13)
• Test Postgres (14)