Improve db util regular expression

[jsumners-nr]

node-newrelic/lib/db/utils.js

Lines 14 to 18 in d2fba9d

	// Suppressing a warning on this regex because it is not obvious what this
	// regex does, and we don't want to break anything.
	// eslint-disable-next-line sonarjs/slow-regex, sonarjs/duplicates-in-character-class
	const match = /^\s*use[^\w`]+([\w$_\u0080-\uFFFF]+|`[^`]+`)[\s;]*$/i.exec(sql)
	return (match && match[1]) || null

This regular expression is triggering sonar-js's "slow regex" rule. We need to investigate what the regular expression does, and see if we can improve it.

[workato-integration]

https://new-relic.atlassian.net/browse/NR-354852