[TASK] Improve consecutive build performance

To improve the consecutive build experience, several caches now kick in
to only lint and compile files that are necessary.

Following changes are done in this patch:

- added cache for eslint
- build TypeScript incremental
- don't mangle TypeScript twice in a full build

To be able to utilize the `--incremental` feature of TypeScript,
generated files are not removed anymore before a build, since TypeScript
needs the previously compiled files for comparision.

The `tsclean` grunt task has been renamed to `clear-build` and is now
executed right before any *full* build.

Side note: on the patch authors machine, the command `grunt scripts`
went from ~30 seconds to ~8 seconds after second invokation.

Resolves: #90187
Releases: master
Change-Id: I2a6cc204aa059411b4d0b26e2e153ff944d190ad
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63019


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Richard Haeser <richard@maxserv.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Richard Haeser <richard@maxserv.com>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>