SpringBoot Consider alignment of MimeMappings with Tomcat's defaults

See https://github.com/spring-projects/spring-boot/issues/30885 for background. Tomcat now has many more default mappings. We need to consider if we want to align with those new defaults and, if we do, how to go about it. There may be a more memory efficient way to do it then simply updating the static map in MimeMappings.

Comment From: philwebb

Closing in favor of PR #32101. Thanks @terminux!