(cherry picked from commit 1c67d0c)

(cherry picked from commit 1c67d0c)

(cherry picked from commit 1c67d0c)

Backported PRs:
- [x] #50832 <!-- Subtype: bug fix for bounds with deeper covariant var
-->
- [x] #51782 <!-- Fix remove-addrspaces pass in the presence of globals
with addrspaces -->
- [x] #55720 <!-- Fix `pkgdir` for extensions -->
- [x] #55773 <!-- Add compat entry for `Base.donotdelete` -->
- [x] #55886 <!-- irrationals: restrict assume effects annotations to
known types -->
- [x] #55867 <!-- update `hash` doc string: `widen` not required any
more -->
- [x] #56148 <!-- Make loading work when stdlib deps are missing in the
manifest -->
- [x] #55870 <!-- fix infinite recursion in `promote_type` for
`Irrational` -->
- [x] #56252 <!-- REPL: fix brace detection when ' is used for transpose
-->
- [x] #56264 <!-- inference: fix inference error from constructing
invalid `TypeVar` -->
- [x] #56276 <!-- move time_imports and trace_* macros to Base but
remain owned by InteractiveUtils -->
- [x] #56254 <!-- REPL: don't complete str and cmd macros when the input
matches the internal name like `r_` to `r"` -->
- [x] #56280 <!-- Fix trampoline warning on x86 as well -->
- [x] #56304 <!-- typeintersect: more fastpath to skip intersect under
circular env -->
- [x] #56306 <!-- InteractiveUtils.jl: fixes issue where subtypes
resolves bindings and causes deprecation warnings -->
- [x] #42080 <!-- recommend explicit `using Foo: Foo, ...` in package
code (was: "using considered harmful") -->
- [x] #56441 <!-- Profile: mention `kill -s SIGUSR1 julia_pid` for Linux
-->
- [x] #56511 <!-- The `info` in LAPACK calls should be a Ref instead of
a Ptr -->
- [x] #55052 <!-- Fix `(l/r)mul!` with `Diagonal`/`Bidiagonal` -->
- [x] #52694 <!-- Reinstate similar for AbstractQ for backward
compatibility -->