[new platform] Explicitly define service setup types

[rudolf]

Explicitly define service setup types instead of using the pattern type ReturnType<MyService['setup']>;

src/core/public:

• BasePathSetup [new-platform] Explicitly define core setup types #34817
• I18nSetup [new-platform] Explicitly define core setup types #34817
• InjectedMetadataSetup [new-platform] Explicitly define core setup types #34817
• FatalErrorsSetup [new-platform] Explicitly define core setup types #34817
• NotificationsSetup
• HttpSetup (assigned to @eliperelman)
• UiSettingsSetup
• ChromeSetup (part of Remove final legacy dependencies from Header UI #38175)

src/core/server:

• [ ]

[elasticmachine]

Pinging @elastic/kibana-platform

[pgayvallet]

Closing, as we are no longer using the ReturnType syntax in any of the listed services.