LONDON—Oil prices were largely steady on Tuesday as investors expected major producers to agree to stick to their planned output increase at their meeting later in the day amid diminishing concerns over the spread of the Omicron variant of COVID-19. Brent crude was up 22 cents, or 0.3 percent, at $79.20 a barrel at 0939 GMT, while U.S. West Texas Intermediate (WTI) crude rose by 21 cents, or 0.3 percent, to $76.29 a barrel. OPEC+, which groups producers from the Organization of the Petroleum Exporting Countries (OPEC) with others including Russia, has raised its output target each month since August by 400,000 barrels per day (bpd). “Number one driver (of global oil prices) at the moment is management of the supply side of the market by (producer alliance) OPEC+,” said Virendra Chauhan, an analyst from Energy Aspects. RBC Capital Markets analysts said OPEC+ was unlikely to change course given the …