Replace options with env vars in linux-virtual-platform.sh

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Replace options with env vars in ltp.sh

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Fix documentation for new env vars

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Replace options with env vars in toolchain.sh

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Replace options with env vars in toolchain-uclibc.sh

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Replace options with env vars in report generation

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Replace options with environment variables for the test scripts

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>