Update BuildFlags.buildDirectoryFromWorkspacePath method for scratch-path

[kartikangiras]

Description

• Add extract(scratchpath()) method to detect scratch-path and buildpath args.
• Update buildDirectoryFromWorkspacePath method with appropriate precedence.
• Add test cases which pass succsefully for the following code change.

Fixes: #2022

Tasks

• Required tests have been written
• Documentation has been updated
• Added an entry to CHANGELOG.md if applicable

[plemarquand]

Looks great! Just one comment about validation since we've had issues reported in he past where users have misconfigured arguments, and they're often hard to track down unless we guard against it defensively.

[kartikangiras]

Looks great! Just one comment about validation since we've had issues reported in he past where users have misconfigured arguments, and they're often hard to track down unless we guard against it defensively.

@plemarquand I have added the necessary validations which were mentioned.