SPRINGFIELD — Two Illinois lawmakers proposed bipartisan legislation today to combat growing heroin and prescription drug abuse, though they acknowledge it may be tough to pass in a difficult budget year. The 240-page bill, sponsored by House Democratic Assistant Majority Leader Louis I. Lang and GOP Rep. John Anthony, is a byproduct of a legislative task force that traveled around the state over recent months to hear testimony from doctors, coroners, pharmacists, treatment centers, addicts and family members on …