Silence libmongocrypt build

[kevinAlbs]

Summary

• Hide libmongocrypt output by default
• Clone libmongocrypt with depth=1
• Use "bash" in every shell.exec

Background & Motivation

Hide libmongocrypt output by default

This is intended to reduce the logs in Evergreen that are not helpful to Go driver development.

Before this change, a sample task includes 1716 lines of log output are from compiling libmongocrypt. After this change, there is 7 lines of output. The full logs of libmongocrypt compile are still printed on error to aid debugging a failed libmongocrypt build. This patch tests a broken libmongocrypt build to verify the logs are printed.

Use "bash" in every shell.exec

This is recommended in Evergreen documentation

shell: shell to use. Defaults to sh if not set. Note that this is usually bash but is dash on Debian, so it's good to explicitly pass this parameter

[qingyang-hu]

I think we need to revise L2473 as well.

[matthewdale]

Looks good 👍

[qingyang-hu]

👍