Bump Ark to latest main (#14669)

Closes #3817
Closes #12840

@:ark

### Release Notes

#### New Features

- N/A

#### Bug Fixes

- The parallel package, which is not supported in Positron, now fails
with an informative error that recommends using PSOCK clusters,
`future::multisession()`, mirai, or `purrr::in_parallel()`
(#3817).

- R 4.6's new table of content is no longer included in Positron help
pages (#12840).

### Commits

- Bump scraper from 0.26.0 to 0.27.0 (#1236)
- Bump rust-toolchain from 1.95 to 1.96 (#1255)
- Bump the rust-crates group across 1 directory with 20 updates (#1312)
- Prevent parallel functions from forking Ark (#1308)
- Set R >=4.6.0's `help.htmltoc`option to `FALSE` (#1307)
- (7) Allow `Package::resolve()` to skip the namespace export check for
`base` (#1305)
- (6) Goto definition tests for workspace package `import()` and
`importFrom()` (#1304)
- (5) Remove `oak_sources` crate (#1302)
- (4) Wire up the production `SourceHandler` in the LSP (#1301)
- (3) Extract out `oak_srcref` for srcref rebuilding (#1300)
- (2) Extract out `oak_source` for CRAN downloads of R packages and R
versions (#1299)
- (1) Implement generic `oak_cache` (#1298)

Author: lionel-