Refactor getBuiltInMacros() to be SBSv1 specific. This are the hard-coded macros misc macros we are adding for SBSv1.
For SBSv2, they are retrieved from the sbs config query. Also, clean up some API and comments on public APIS
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This extension points allows you to modify the environment variables used for Carbide builds. The builder will generate the list of environment variables for the build configuration, make any changes the builder needs to make, and then allow extensions to alter those environment variabes before the build is performed.
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Carbide 1.3.1
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