Add more team members to pr_owners.txt (#41416)
Add more team members to pr_owners.txt (#41416)

1. I may have missed some frequent committers. Please let me know if I
did.
2. I'm not sure what pr_owners.txt is used for, besides the bot's
isTeamMember check. Maybe there's a reason the list is so small.
weswigham/TypeScript,kpreisser/TypeScript,RyanCavanaugh/TypeScript,Microsoft/TypeScript,kitsonk/TypeScript,RyanCavanaugh/TypeScript,SaschaNaz/TypeScript,microsoft/TypeScript,SaschaNaz/TypeScript,microsoft/TypeScript,microsoft/TypeScript,Microsoft/TypeScript,weswigham/TypeScript,kitsonk/TypeScript,kpreisser/TypeScript,RyanCavanaugh/TypeScript,kpreisser/TypeScript,SaschaNaz/TypeScript,kitsonk/TypeScript,Microsoft/TypeScript,SaschaNaz/TypeScript,weswigham/TypeScript