LONDON (Reuters) -British transport minister Grant Shapps will run in the contest to replace Prime Minister Boris Johnson, he told the Sunday Times newspaper, joining what is expected to be an increasingly crowded field. Shapps has ruled out holding a national election if successful, but would produce an emergency budget within his first 100 days to cut taxes for the most vulnerable and give state support to firms with high levels of energy consumption, the paper reported in an article published online on Saturday. “We have had two-and-a-half years of tactical government by an often distracted…