Package base tsconfigs in packages

[spalger]

Part of #128012 will be moving everything to packages, but I think we should move tsconfig.json base files into packages sooner rather than later. This will allow us to define a dependency in bazel on the base config file and get the deps listed in "types" along with the config.

For instance:
tsconfig.base.json references the following modules in it's types list, which means they will be loaded by any tsconfig file extending it:

• node
• jest
• flot
• jest-styled-components
• @testing-library/jest-dom
• @emotion/react/types/css-prop

It would be great if we took this opportunity to move the browser specific types to tsconfig.browser.json and properly extend the baseConfigs we actually need.

[elasticmachine]

Pinging @elastic/kibana-operations (Team:Operations)