Allow custom linters to auto-fix

This allows custom linters hook into the `--fix` functionality.
Custom linters specify the fixes using the Go analysis structures,
which allow for arbitrary char offsets for fixes; they get converted
into golangci structures, which are line-based. If the conversion is
not possible, the fix is dropped on the floor.

Signed-off-by: Steve Coffman <steve@khanacademy.org>

Test plan:
go test ./...

dev: fix release workflow (golangci#5156)

build(deps): bump github.com/uudashr/iface from 1.2.0 to 1.2.1 (golan…

…gci#5154)

build(deps): bump go-simpler.org/musttag from 0.12.2 to 0.13.0 (golan…

…gci#5121)

build(deps): bump github.com/securego/gosec/v2 from 2.21.1 to 2.21.2 (g…

…olangci#4997)

build(deps): bump github.com/securego/gosec/v2 from 81cda2f91fbe to a…

…b3f6c1c83a0 (golangci#4943)

build(deps): bump github.com/securego/gosec/v2 from 5f0084eb01a9 to 8…

…1cda2f91fbe (golangci#4927)

chore: free skip space during release

go1.23 support (golangci#4836)

build(deps): bump github.com/golangci/misspell from 0.5.1 to 0.6.0 (g…

…olangci#4804)