Building the rules on Windows platform without Bash shell installed

[AlexanderGolovlev]

Description

Currently building the rules utilizes Bash shell commands. This requires installing the Bash shell on Windows platform (via MSYS2), and configuring it using shell_executable option or BAZEL_SH environment variable.
However, the build environment on Windows may be not properly configured for Bash. The preferred approach is utilizing the native commands.

Suggested changes are shown in this pull request:
#314

[stakira]

#308 is an issue of the same cause but is much more awkward. The error message is super confusing and un-actionable.