Move more cache items from the default to the bootstrap or discovery bin

Problem/Motivation

Quite a few default cache entries in the default bin are quite small and used on many if not all requests. They're a good fit for the bootstrap or discovery cache bin, so that we can benefit from the fast chained backend.

This is how cache_default and cache_bootstrap look like for me on a site with a bunch of modules installed:

mysql> select cid, length(data) from cache_default where cid not like 'twig:%' order by length(data);
+------------------------------------+--------------+
| cid                                | length(data) |
+------------------------------------+--------------+
| user_permissions_hash:anonymous    |           64 |
| path_alias_whitelist               |          733 |
| config_translation_info_plugins:en |        10841 |
| theme_registry:runtime:bartik      |        16621 |
| theme_registry:runtime:seven       |        22053 |
| system.module.info                 |        29992 |
| theme_registry:build:modules       |        66926 |
| theme_registry:seven               |        74417 |
| theme_registry:bartik              |        75546 |
+------------------------------------+--------------+
10 rows in set (0.00 sec)

mysql> select cid, length(data) from cache_bootstrap order by length(data);
+--------------------------------------+--------------+
| cid                                  | length(data) |
+--------------------------------------+--------------+
| last_write_timestamp_cache_bootstrap |           17 |
| hook_info                            |         3422 |
| routing.non_admin_routes             |         6106 |
| module_implements                    |        13229 |
| system_list                          |        22644 |
| theme.active_theme.bartik            |        68212 |
| theme.active_theme.seven             |        68471 |
+--------------------------------------+--------------+

( I ignored twig entries because they're only around on dev (or should be) anyway.

Proposed resolution

Based on that list, the user permissions hashes, the path alias whitelist seem to be good matches for bootstrap. config_translation_info_plugins:en are plugin definitions, so should be in discovery. flag I suppose too but that's contrib.

Not sure about the theme registry runtimes, maybe? It's quite likely that one of them is requested but I suppose they could get a bit bigger.

system.module.info is not requested on a normal request, so I guess not.

Note: While the bootstrap cache bin is named like that, and introducing a different cache bin might make more sense semantically, it already is the "cache_tiny_and_99percent" bin, it contains things like hook list and implementations, active theme.. those are not really related to bootstrap already.

Remaining tasks

Check if there are more things to move.

User interface changes

API changes

Data model changes