Add convenience method for YaraScanner#1859

JSCU-CNI wants to merge 2 commits intovolatilityfoundation:developvolatilityfoundation/volatility3:developfrom

JSCU-CNI:feature/add-yarascan-text-methodJSCU-CNI/volatility3:feature/add-yarascan-text-methodCopy head branch name to clipboard