Conduct a Mutation testing against the Test Scenarios in ditribution and installers

[keizer619]

Description:

Currently we have tests in ballerina-distribution repository and then we have tests in Ballerina installer tests as well. We assume these tests will assure the functionality.

Some of tests may not catch actual bugs due to various reasons like tests are using intermediate packs and can be exit code is wrong.

Therefore we need to conduct a Mutation testing effort by introducing few bugs purposely and assure how many of them identified by our current test suite.